Hunting-Percival aircraft


Fight for yor Right!
14 January 2007
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Hi all,

P.1 "Gull Four Mk.I" 1932
P.2 "Mew Gull" ( E.1) 1933
P.3 " Gull Six" 1934
P.4 project sport 1935
P.5 project sport 1935
P.6 "Mew Gull" ( E.2 ) mit Gipsy Six
P.7 Gull with open cockpit
P.8 project sport 1935
P.9 project sport 1935
P.10 "Vega Gull"
P.11 variant of Vega Gull project
P.12 variant of Vega Gull project
P.13 variant of Vega Gull project
P.14 variant of Vega Gull project
P.15 variant of Vega Gull project
P.16 ( Q.4 ) project
P.17 ( Q.6 "Petrel" )
P.18 ( Q.6 "Petrel" )
P.19 bomber project
P.20 ( T.1/37 )
P.21 trainer project
P.22 ???
P.23 ???
P.24 ???
P.25 ( S.24/37 )
P.26 motor-test project
P.27 amphibium project
P.28 "Proctor"
P.29 bomber project 1939
P.30 "Proctor II"

P.19 light bomber for China.
P.21 two seat elementary trainer.
P.22 high speed target aircraft.
P.31 & P.34 Proctor.
P.41 & P.42 twin engined airliner against Bristol Brabazon.
P.23 : 1937 communications to Spec T.7/37 Alternative
P.23A : 1937 " Spec T.7/37
P.23B : 1937 " Spec T.7/37

source : The Aeroplane Spotter : February 7,1948
P.31 "Proctor IV"
P.32 ???
P.33 fighter project
P.34 " Proctor III"
P.35 transport project 1943
P.36 passenger transport project 1943
P.37 bomber project 1943
P.38 ???
P.39 ???
P.40 "Prentice"
P.41 passenger transport project
P.42 passenger transport project
P.43 "Peewit" ???
P.44 "Proctor V"
P.45 "Proctor VI"
P.46 ( Youngman-Baynes H.L.1 )
P.47 ???
P.48 "Merganser Mk.I"
P.49 "Merganser Mk.II"
P.50 " Prince"
P.51 to P.53 ???
P.54 "Survey Prince"
P.55 ???
P.56 "Provost"
P.57 "Sea Prince"
P.58 to P.65 ???
P.66 "Pembroke"
P.67 to P.73 ???
P.74 helicopter
P.75 to 83 ???
P.84 "Jet Provost"
P.85 trainer project
P.86 ???
P.87 passenger transport project 1955
P.88 to P.104 ???
P.105 helicopter project 1955
P.106 ???
P.107 or Hunting H.107 passenger transport project

PLEASE complete this list. Drawings or pics from the projects are Welcome!

Servus Maveric

P.91 was ultra-light helicopter for Spec. HR.144T.

P.38 twin engined photo-reconnaissance project,powered by two 3000 hp
P.39 8-10 seat high wing transport project,powered by two 1010 hp Leonides
pusher engines.
P.68 & P.69 AOP aircraft for Spec. A20/49.
Have just found this site and was a great site it is.

Re Percival Hunting aircraft I have a listing of all the projects which I am trying to find and will hopefully provide information over the weekend.

I found this whilst researching my book Stuck on the Drawing Board, which although dealt with commercial aircraft meant that I also came across quite a large amount of information etc on military projects. I also have a number of 3 view drawings on Hunting/Percival projects.


Richard Payne
This would be very welcome Richard.
John Silverster's book 'Percival & Hunting Aircraft' produces
none but one project , the H-107...
Oh richard,

if you can please post your projects... :) :D ;D
Good afternoon

Re Hunting/Percival projects

P51- 5 seat executive aircraft
P55 - trainer project
P58 - trainer
P59 - twin tailed Prentice
P60 - 5 seat twin
P61- Research jet
P62 - Helicopter
P63 - Helicopter
P64 - Pembroke development
P65 - 4 engined Pembroke STOL aircraft
P67- Glider
P70 - Shipboard fixed u/c
P71- Prince float
P72- General Purpose helicopter
P73 - drone
P75 - Prince military derivative
P76 - Helicopter
P77- Prince military derivative-deck landing
P78 - Military helicopter
P79 - Military helicopter
P80- trainer
P81- pembroke modification
P82 - trainer
P83- military jet
P86 - Compound helicopter (1952 ) for BEA
P88 - naval jet
P89 - pembroke development
P90- Military helicopter
P92- DC3 replacement
P93- Provost development
P94 - VTOL study
P95 - jet transport
P96 - Helicopter to SPEC HR146
P97 - naval jet
P98 - Helicopter to spec HR 149 for RCAF
P99 - Larger Pembroke
100- Larger Pembroke
101 - Larger Pembroke
102- Helicopter
103-Valetta replacement
104 - P74 development
106 - 105 development - helicopter
107 - 2 Orpheus jet transport
108 - 14 seater helicopter
109- aerodrome barrier
110- 20 seater powered by 2 Oryx
111- conversion of P56 to 4 seat communicationa/c
112-Camera installation in Belgian pembroke
113-helciopter 1 x RB108
114- helicopter z x RB108
115- jet flap JFR1-JFR13
116- 20 seater Viper or de rated Orpheus engines
117-executive - Orpheus powered
118-fuselage insertion President development
119-18 seat 3 abreast general purpose a/c
120 MKIII aerodrome barrier
121- Jet flap research
122- jet flap 26 seat transport - RB108
123- A5V engine clearance in Jet Provost T Mk 2
124- 18 - 24 seat t/p 2 x T 58
125- jet provosot Mk 3 - 4 s eat communicator
126- jet flap research a/c
127- tandem seat trainer (jet provost wings, rear fuselage, empennage
128- ground attack a/c Jet provost wings, rear fus and empennage
129- stretched President gnome t/p
130 - shortened military version of 107
131- VTOL jet lift project
132- VTOL ciculift project
133 - wingless jet VTOL assault craft
134- small twin jet
135 - FD2 Ogee conversion -
however also noted as a naval trainer/transport Valetta replacement ?
136- STO/VL trainer
137/137R - conventional agricultural a/c
138- pusher version of 137
139- variable sweep trainer BS 75 - swept forward wing??
140 - GA 6 seat based on jet provost
141- Mk 5 pressurised Jet Provost
142- Agricultural ac/
143- swept wing version of JP
144- fuselage mounted lift transport
145- MK5 JP
146- low wing trainer unswept wing
147- high wing trainer- alternative wing
148- jet trainer supersonic (VG) working model made ?
149- Jet trainer development of 147?
150- elementary jet trainer
151- two rear mounted on wing jet transport
152- four jet 107 class transport
153- Twin jet subsonic fixed wing trainer
154- jet flap 1-11 type aircraft
155- advanced trainer fixed wing - co-ordinated with EE
156- modified JP COIN
157- t/p COIN
158- twin engined basic trainer
159- JP modified 2 Aubisque
160- Tandem COIN a/c
161- side by side COIN
162- basic trainer as 158 JP cockpit, wings, t/p and fin
163- twin engined COIN
164- BAC 164
165- COIN proposal twin
166- BAC 166
167- BAC 167
168- JP deriv to carry large military load modfied and stretched 164
169- AEW Pembroke 2 turbofans
170- 164 with RB172
171- 164 RB152-61
172- twin turboprop
172- twin jet COIN 2 x Viper

That is as far as I go re information that I have found - hope this may be of some help.

Drawings on the 51, 64, 65, 85, 86, 107, 113, 124 and 152 I was able to put in my book Stuck on the Drawing Board.

With Percival, as part of the Hunting Group, changing its name to Hunting Percival in 1954, do we know which is the first project that may be considered under that name?
hesham said:

P.19 light bomber for China.
P.21 two seat elementary trainer.
P.22 high speed target aircraft.
P.31 & P.34 Proctor.
P.41 & P.42 twin engined airliner against Bristol Brabazon.
Mr. Bage, chief designer of Percival Aircraft, said that light bomber for China was one
among the Vega Gulls versions designated from P.10 to P.15 & P.20.
Percival P.19 was a four - engine, high - wing monoplane and it's hard to image four engined light bomber ;D
Hi Boogey,

the P.19 was not four engined light bomber,it was developed from Gull.
Well, now I'm just thinking who is right ? Mr. Bage, claiming : P.10 to P.15
and P.20 were various versions of the Vega Gull, including a light bomber project for Chinese ...

and afterwards P.19, P.21, P.22, P.23. P.24, P.25, P.26 and P.27 were designs
varying from a four - engine, high - wing monoplane ( P.19 ) ... to ... ( P.26 ) was also included

or You, insisting ;D on P.19 was Chinese bomber.
I'm really curious what root have You taken Your information from
and, by the way, which of Percival's designs were military aircraft or at least used in auxiliary role by RAF
or by the other countries airforces.

In my register of Percival military aircraft I have Percival Gazelle,
Polish designer Jerzy Dąbrowski's project of training and observation airplane
derived from pre - war Polish fighter PZL-62 project.


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Some poor quality illustrations of Percival projects, from The Aeroplane Spotter, February 7th 1948.

Regards Bailey.


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Percival Aircraft P.83/1
A rocket powered interceptor with modest forward swept wings.
Source: Grumman X-29 - An Aeroguide Special by Bill Gunston, page 5, Linewrights Ltd.


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A combined list with a couple of additions, a few corrections, and the usual host of questions ...

(09 June 2020) This list has now been revised, rationalized, and updated ... but still with plenty of gaps.

The Percival Aircraft assigned lettered Type designations to projects with 'P' designations assigned as those projects reached a more advanced stage. Where known, I've included those original Type designations. According to Peter G. Dancey (in British Aircraft Manufacturers Since 1909), those lettered Type designations were dropped around 1944 when Percival was acquired by the Hunting Group.

As Cy-27 notes, there is some wobble in the 'P' designations after the Hunting Group acquisition. Often the 'P' designations were retained, other times 'H' for Hunting prefix letters were substituted. Sometimes P.xx and H.xx seem to have been used almost interchangably. For simplicity, I've elected to retain 'P' designations - even for built types like the H.126.

For completeness, Cy-27 summarized the designation letter groupings used by D.W. Gearing in On The Wings of A Gull: Percival and Hunting Aircraft. These were:

P.1 to P.119 --- Percival Aircraft Co. Ltd. type designations
166 and 167 ---- British Aircraft Corporation (BAC) type designations
H.168 to H.173 - Hunting Percival/Hunting Aircraft type designations

Later Edgar Percival 'EP' designations can be found here:


Percival Aircraft (1933-1954), Hunting Percival (1954-1957), Hunting (1957-1959)

P.1 --- 1932 Gull Four Mk.I (D Series) tourer/racing monoplane
- P.1 : Gull Mk I (D.1) prototype, 130 hp Cirrus Hermes IV
- P.1A: Gull Four Mk II (D.2), 130 hp Cirrus Hermes IV
- P.1B: Gull Four Mk IIA (D.2), 160 hp Napier Javelin III
- P.1C: Gull Four Mk IIB (D.2), 130 hp DH Gipsy Major
- P.1D: Gull Four Mk III (D.2), 130 hp DH Gipsy Major
- P.1E: Gull Four Mk III (D.2), 135 hp Cirrus Major I or II

P.2 --- 1934 Mew Gull (E.1) single-seat racer, 165 hp Javelin IA

P.3 --- 1934 Gull Six 3/4-seat tourer, aka Type D (D.3)
- P.3 : (??)
- P.3A : Gull Six, 1 x 200 hp DH Gipsy Six

P.4 --- (Project) 1935 twin-engined monoplane feederliner
- P.4: 8-10 seat, low-wing, retr. u/c, single fin/rudder
- P.4 : aka Percival Type F
- P.4 : 2 x 500 hp Bristol Aquila radials, span 18.70 m
- P.4A: 2 x 700 hp Pratt & Whitney Twin Wasps, span 18.70 m

P.5 --- (Project) 1935 pusher high-winged light cabin monoplane
- P.5: 2-seat side-by-side cabin, strut-braced wing, trike u/c
- P.5: 1 x 86 hp Pobjoy Niagara R radial, span 10.97 m
-- P.5: Engine mount above wing as pusher, aka Percival Type G

P.6 --- 1935 Mew Gull II (E.2) racing monoplane, engines vary
- P.6 : aka Percival Type E (or Type E.2H?)
- P.6 (E.2H): G-ACND, 200 hp Gipsy Six, 180 hp Regnier R6
- P.6 (E.2H): G-AEKL, 200 hp Gipsy Six, 205 hp Gipsy Six II
- P.6 (E.2H): G-AEXF, 200 hp Gipsy Six, 220 hp Gipsy Six R, 210 hp Gipsy Queen
- P.6 (E.2H): G-AEMO, 200 hp Gipsy Six
- P.6 (E.3H): G-AFAA, 'Super-Mew', 205 hp Gipsy Six II
- P.6A: 1938 Mew Gull IIA, 1 x 205 hp DH Gipsy Six R, G-AFAA

P.7 --- 1935 'Touring Gull' tandem open cockpits, x 1
- P.7: 1 x 200 hp DH Gipsy Six Srs I, span (??) m, VT-AGV

P.8 --- (Project) 1935 Type J* low-winged monoplane target aircraft
- P.8 : Radio-controlled Fleet Gunnery target aircraft to Q.32/35 (OR.29)
- P.8A: Twin-float version to Q.32/35; both could be flown by single pilot
-- NB: assigns K8889-'90 to "Percival P.8"
-- * But note that drawing (below) is described as "Type H"

P.9 --- (Project) 1935 8-seat 2-engine light commercial transport
- P.9: Low-winged monoplane, forerunner of Type Q (see P.16/P.17)
- P.9: 2 x 205 hp Gipsy Six Srs II 6-cyl., span 15.24 m
- P.9: Slightly smaller forerunner of Type Q - aka Q.6 (below)
-- P.9 also listed as sports a/c (error or designation re-use?)

P.10 -- 1935 Vega Gull (K Series) 4-seat tourer
- P.10 (K.1): Vega Gull, 200 hp DH Gipsy Six Srs I
- P.10A: Vega Gull I, 205 hp DH Gipsy Six Srs II
- P.10B: Vega Gull II, rounded windscreen, Srs I/Srs II
- P.10C: Vega Gull III, 205 hp DH Gipsy Six II

P.11 -- (Project) 1935 twin-engine trainer to AM Spec. 23/36
- P.11: 2 x 205 hp Gipsy Six Srs II 6-cyl., span 15.24 m
-- P.11: (aka Percival Type L)

P.12 -- (Project) 1935 single-engined, tandem-seat trainer
- P.12: 2-seat low-wing monoplane (Vega Gull variant?)
- P.12: 1 x 130 hp DH Gipsy Major I, span 10.67 m
-- P.12: Ordered as communications a/c for 20/38, later cancelled
-- P.12: aka Percival Type M

P.13 -- (Project) 1935 Vega Gull variant
- P.13 :
- P.13A: (Project) 1935 P.13 fitted with variable pitch propeller

P.14 -- (Project) 1935 high-winged monoplane passenger transport
- P.14: 4 x 395 hp Napier Rapier H-16s, span 23.47 m
- P.14: 14 seats, retractable main undercarriage

P.15 -- Vega Gull variant

-- Might any of the above Vega Gull variant be for: 14 x Vega Gulls for RAF comms (Spec 20/38); racing/record Vega Gulls; optional DH Gipsy Six Series II (and VP prop); or Mk II fitted with curved windscreen?

P.16 -- (Project) 1936 Q.4, 4-seat executive transport
- P.16 : Early design stage, eclipsed by enl. P.17/Q.6
- P.16E: Early designation for built (prototype?) P.17
- P.16E: Also listed as Q.6 Mark V production a/c

P.17 -- 1937 Q.6 low-wing twin-engined 6-seat feederliner
- P.17: 2 x 200 hp DH Gispy Six II, span 14.22 m
- P-17: Q.6 Mk I, prototype G-AEYE with Q.4 wings, x 1
- P.17: Q.6 Mk II, fixed-gear production variant, x 12
- P.17: Q.6 Mk III, retr. u/c production variant, x 4*
-- Plus one Q.6 Mk II converted to retr. u/c Mk III std
- P.17: (Project) Q.6 Mk IV, 1936 aerial survey variant
- P.17: Q.6 Mk V, Petrel 4-pax military comm. a/c, x 9
-- Petrel to Spec 25/38, some sources list P.18 desig.

P.18 -- (Project) 1937 Imperial Airways medium-range airliner
- P.18 : Twin-engined, braced high-wing, twin fins/rudders
- P.18 : 4 x 205 hp DH Gispsy Six engines, span 18.29 m
-- P.18: aka Percival Type R
- P.18A: Enlarged, more-powerful development of orig. P.18
- P.18A: 4 x 200 hp Menasco B6S Buccaneers, span 18.29 m
- P.18B: Enlarged, more-powerful development of orig. P.18
- P.18B: 4 x 290 hp Wolseley Scorpio II, span 18.29 m

P.19 -- (Project) four-engine, high-wing monoplane

P.20 -- (Project) 1937 ab initio trainer to Spec. T.1/37
- P.20: 2-seat tandem, open-cockpit Vega Gull deriv.
- P.20: 1 x (??) inline, span (??) m

P.21 -- (Project) 1937 Type T radio-controlled target to Q.8/37
- P.21 : Initial, mid-winged vers. with outrigger wing floats
- P.21A: Revised, shoulder-winged vers., stabilizing sponsons
-- NB: There is debate over which design is P.21 and P.22

P.22 -- (Project) 2-engined RAF communications a/c to T.7/37
- P.22: Low semi-elliptical wings, fixed spatted u/c, twin tails
- P.22: 2 x 205 hp DH Gipsy Six II engines, span (??) m

P.23 -- (Project) 2-engined RAF communications a/c to T.7/37
- P.23 : 2 x 130 hp Pobjoy Niagara V engines, span (??) m
- P.23A: 2 x 130 hp DH Gipsy Major I engines, span (??) m
- P.23B: 2 x 140 hp DH Gipsy Major II engines, span (??) m

P.24 -- (Project) 1937 mid-winged 14-pax twin-engine transport
- P.24 : (??) no details
- P.24A: 2 x 925hp Bristol Pegasus XX radials, span (??) m

P.25 -- (Project) 1937 Type X, Special Observation Naval a/c
- P.25: 3-seat pusher a/c carrier type, no suitable powerplants
-- P.25: Submitted to both S.23/37 (OR.52) and S.24/37 (OR.53)

P.26 -- (Project) 1938 test airframe for large aero-engines
- P.26 : Engine testbed, resembled an enlarged Vega Gull
- P.26 : Testbed for inline engine (Napier Sabre?)
- P.26A: Testbed for 2,300hp Bristol Centaurus radial

P.27 -- (Project) 1939 2-engined 4-8 pax amphibian flying boat
- P.27: High-winged monoplane, cruciform tail, wing floats
- P.27: 2 x 205 hp DH Gipsy Six IIs 6-cyl,* span 14.63 m
-- * Engines mounted on pylons above wings, aka Percival Type Z

P.28 -- Proctor I, 1939 3-seat RAF comms a/c, 247 built
- P.28 : Communications aircraft based on Vega Gull
- P.28A: (??)
- P.28B: (Project) Civil Proctorl I variant, none built
- NB: All Proctorl variants powered by 210 hp DH Gispy Queen II

P.29 -- 1939-40 Proctor light bomber variant
- P.29: Proctor prototype P5998 anti-invasion defence
- P.29: 3-seater, 1 x 208 hp DH Gipsy Queen II
-- Orig. Proctor light bomber concept for China (??)

P.30 -- Proctor II, 3-seat trainer, 196 built
- P.30 : Radio trainer vers. of Vega Gull to AM Spec 20/38
- P.30A: (??)
- P.30B: (Project) Civil Proctorl II variant, none built

P.31 -- Proctor IV, enlarged 4-seat radio trainer, 258 built
- P.31 Preceptor: Orig. proposed name, to AM Spec T.9/41
- NB: 1 x Proctor IV fitted with 250 hp Gispy Queen 31*
-- * Also see Percival P.47 and P.47A (below)

P.32 -- (Project) 1940 ground-attack/anti-invasion aircraft
- P.32: A proposed armed, military variant of P.6 Mew Gull
- P.32: (??) aka Percival Type Aa (??); 2 x .303-in Vickers mgs
-- 3v:

P.33 -- (Project) 1940 single-seat, single-engine monoplane fighter
- P.33 : Low-set, cranked wing, 4 x 0.303" Browning machine guns
- P.33 : Nose-mounted radiator (like the competing Miles M.20/II)
- P.33 : 1 x 1,300 hp R-R Merlin XX, span 12.24 m
- P.33 : Percival Type Aa, 1,300 hp R-R Merlin XX
- P.33 : Percival Type Ab, (??) minor diff. from Type Aa (??)
-- 3v:

P.34 -- Proctorl III, 2-seat radio trainer, 437 built
- P.34 : Proctorl III RAF dedicated radio trainer
- P.34A: (Project) Civil Proctorl III, none built

P.35 -- (Project) 1943 4-engined civil freighter/transport
- P.35: Burnelli-style blended-body with twin tail-booms
- P.35: 4 x Bristol Centaurus radials, span 42.67 m

P.36 -- (Project) 1943 blended-wing twin-boom airliner*
- P.36: Burnelli-type blended-body, twin tails on booms
- P.36: 6 x 2,500 hp Bristol Centaurus, span 48.15 m
-- * or heavy bomber (??) design, aka Percival Type Af

P.37-- (Project) 1943 blended-wing twin-boom heavy bomber
- P.37: Burnelli-type blended-body, twin tails on booms
- P.37: 4 x 2,500 hp Bristol Centaurus, span 42.67 m
-- Bomber devel. of P.35 transport (qv), aka Percival Type Ag

P.38 -- Photo-reconnaissance aircraft, 2 x R-R Merlins

P.39 -- (Project) 1943 8-10 seat high-wing transport a/c
- P.39: Nacelles beneath high wings, low-set tailplane
- P.39: 2 x 505 hp Alvis Leonides pushers, span 15.85 m
-- P.39: Possibly aka Percival Type Ai

P.40 -- 1946 Prentice 3-seat basic trainer to T.23/43
- P.40: Low-wing 3-seat trainer, fixed spatted u/c, x ~370
- P.40 : Prentice T.1, 250 hp DH Gipsy Queen 32
- P.40 : Prentice T.2, 295 hp DH Gipsy Queen 51
- P.40 : Prentice T.3, 345 hp DH Gipsy Queen 70-2
-- Ant desig. for civil conv. (Aviation Traders + 7-seater??)

P.41 -- (Project) 1946 20-passenger transport (Brabazon Spec. 5A)
- P.41: Pressurized a/c for short- and medium-range routes
- P.41: All-metal constr'n, tricycle u/c, aka Percival Type Al*
- P.41: 4 x 330 hp DH Gipsy Queen 71s, span 16.96 m
- P.41: Alternative, 2 x 1,000 hp Bristol Perseus radials
-- * Possibly Type Al standing for 'Type A light'?

P.42 -- (Project) 1946 high-wing pax transport (Brabazon Spec. 5A)
- P.42: High-wing multi-engined airliner, retractable u/c
- P.42: 2 x (??) engines,* span 21.03 m
- P.42: 4 x (??) inline engines,** span 21.03 m
- P.42: 4 x 505 hp Alvis Leonides radials, span 21.03 m
-- P.42: aka Percival Type Am (for 'Type A medium'?)
-- * Flight 0017 says 2-engined
-- ** Aeroplane Spotter shows 4 engines

P.43 -- (Project) 1944 Peewit civil Proctor variant
- P.43: 4-seat civil deriv., abandoned for Proctor V
- P.43: aka Percival Type Aq

P.44 -- 1946 Proctor Mk.V, civil vers. Proctor 4
- P.44: RAF Proctor C.Mk.5 acted as P.44 prototypes, x 3
- P.44: Civilian Proctor 5 or Proctor Mk.V, x 150
- P.44: 1 x 250 hp DH Gipsy Queen 30-2, span 12.04 m

P.45 -- 1946 Proctor 6 engine testbed/floatplane
- P.45: Proctor IV NP384 as an engine test-bed
- P.45: 4-seater, 1 x 300 hp DH Gipsy Queen 52-71
- P.45: Fitted out with floats for Hudson’s Bay Company

P.46 -- Heston Youngman-Baynes HL.1 high-lift research a/c
- P.46: Proctor components combined with full-span flap wing

P.47 -- 1946 higher-powered Proctor VI prototype, x 1
- P.47 : 4-seater, 1 x 250 hp DH Gipsy Queen 31
-- P.47: P.31 Proctor IV airframe conversion (??)
- P.47A: (Project) Prod'n Proctor VI floatplane

P.48 -- Merganser I, 1947 all-metal contr. light airliner
- P.48 : High-wing monoplane, retr. tricycle u/c, 5-8 pax
- P.48 : 2 x 295 hp DH Gipsy Queen engines, span 14.55 m
- P.48 : 5-8 seat transport, 1 built (G-AHMH + 2 fuselages)
- P.48A: (Project) Merganser floatplane variant, not built
- P.48B: (Project) Merganser ski-plane variant, not built
- P.48?: Flying boat (removal planning bottom/sponsons

P.49 -- (Project) Merganser II dedicated aerial survey variant
- P.49: 5-8 seat survey type, abandoned with Merganser project

P.50 -- Prince, 2-engined high-wing transport
- P.50 Prince : Merganser-based prototype, x 1
-- P50/1, G-23-1/G-ALCM, upright Merganser windscreen
- P.50 Prince 1 : 2 x 520 hp Alvis Leonides 501/4s
-- P50/2, G-ALFZ, PP-XEG (Brazil), PP-NBA (Brazil)
- P.50 Prince 1A: (??) hypothetical designation
- P.50 Prince 1B: Executive Transport (only exec vers. mentioned)
- P.50 Prince 2 : Init. prod., Leonidesl 501/4s, 5 built
-- Prince 2s had sloping windscreens and wing spar mods.
- P.50 Prince 3 : Leonidesl 502/4s, longer nose, 12 built
- P.50 Prince 3A: 2 x 550 hp Alvis Leonides 502/4s
-- Eg: P50/41 G-AMNT for Thailand (as T1-1/96)
- P.50 Prince 3C: Eg: P50/40 for RAAF, serial A90-3
- P.50 Prince 3D: 2 x 560 hp Alvis Leonides 502/5s
- P.50 Prince 3E: 2 x 550 hp Alvis Leonides 502/4s
-- Prince 3E G-AMPR conv. to executive a/c, conv. to '4D
- P.50 Prince 4 : 550 hp Leonidesl 503/4s, 10 x conv.
- P.50 Prince 4B: 550 hp Leonidesl 503/5 engines
- P.50 Prince 4D: 550 hp Leonidesl 503/5 engines
- P.50 Prince 4E: 550 hp Leonidesl 503/5 engines
- P.50 Prince 5 : Became the Percival President I
- P.50 Prince 6 : Leonidesl 504 conversions
- P.50 Prince 6B: 540 hp Leonidesl 504/5A engines
- P.50 Prince 6E: Eg: P50/46 G-AMLZ preserved at LPL

P.51 -- (Project) 1947 low-wing twin-engined 5-seat executive a/c
- P.51: 2 x (??) engines, retr. tricycle u/c, some Q.6 features (??)
- P.51: Pos. sim. to Prince IIIE executive transport variant?

P.52 -- (??)
P.53 -- (??)

P.54 -- Survey Princel, transp. nose + camera hatches, 6 built

P.55 -- (Project) 1949 Prentice III RAF trainer
- P.55: Fitting between early Prentice & Provost
- P.55: 3-seater, 1 x 250 hp DH Gipsy Queen (31?)

P.56 -- 1950 Provost ab initio trainer to OR 257*
-- * Spec. T16/48 was replacement for Percival Prentice
- P.56: Prototypes (2 x Cheetah-powered, 1 x Leonides Mk 25)
- P.56: Production T.1 (1 x 550 hp Alvis Leonides 126 radial)
-- Separate desig. for export Provost Mk 51, Mk 52, or Mk 53 (??)

P.57 -- Sea Prince, P.50 vers. for Royal Navy, x 48
- P.57: Sea Prince C1, RN Prince 2, x 3
-- NB: Sea Prince C1 may have had a P.66 desig.
- P.57: Sea Prince T1, RN Prince 3, x 41
-- Sea Prince T1 for navigation and ASW training
-- Radar nose, twin-wheeled main u/c, longer nacelles
- P.57: Sea Prince C2, T1 transport variant, x 4

P.58 -- (Project) 1950 tandem 2-seat military (??) trainer
- P.58: 1 x 203 hp (??) Blackburn Cirrus Bombardier

P.59 -- 1950 P.40 Prentice fitted with twin tails
- P.59: Prentice VN684 modified for spin trials

P.60 -- (Project) 19?? low-wing twin-engined 5-seat private a/c
- P.51: 2 x DH Gipsy Majors, span (??) m, retr. tricycle u/c
-- P.51: Said to resemble the slightly larger Beagle 206

P.61 -- (Project) 1950 jet-propelled research aircraft
- P.61: Swept shoulder-wing, single-seat aircraft project
- P.61: 1 x (??) lbf de Havilland Goblin turbojet

P.62 -- (Project) 1950 Ram-jet helicopter

P.63 -- (Project) 1950 Pulse-jet helicopter

P.64 -- (Project) Merganser/Prince development
- P.64: Simplified Prince, 2 x Alvis Leonides radials

P.65 -- (Project) 4-engined, 18-pax* Pembroke development
- P.65: 4 x DH Gipsy Majors, fixed tricycle undercarriage
- P.65: Redesigned 3-part wing with constant-chord inner panels
-- * But note that 3-view drawing (below) shows 14 x pax seats
-- 3v:

P.66 -- 1952 Pembroke/President, long-winged P.50 Prince 3
- P.66: Pembroke light transport for RAF & export, 123 built
-- Pembroke C(PR).1: 6 x photo-recce aircraft
- P.66: President 1: civil version of P.66 Pembroke, x 1
- P.66: President 2: 2 x Alvis Leonides 514/5As, x 4
- P.66: (Project) Executive President 1957 6-pax exec transp.

P.67 -- (Project) Glider

P.68 -- (Project) 2-seat low-wing Gazelle AOP, to A20/49
- P.68 : Tandem-seat Air Observation Platform/Liaison aircraft
- P.68 : 1 x 183 hp DH Gipsy Major 30 4-cyl, span 11.05 m
- P.68/5: AOP, 1 x 203 hp (??) Blackburn Cirrus Bombardier
-- P.68 : Dąbrowski's Gazelle based on his pre-WWII PZL-62

P.69 -- (Project) 1950 Air Observation Post to A20/49 / OR 270
- P.69: Alt. submission to P.68 (and poss. derived from P.68)

P.70 -- (Project) 1950 Twin-engined shipboard ASW/torpedo bomber
- P.70: 3 x crew, mid-placed folding wings, retr. tailwheel u/c
- P.70: 2 x Alvis Leonides (Major?) radials
- P.70/?: Anti-submarine vers. with ASW equipment and ordnance
- P.70/?: Torpedo vers, carried in a streamlined belly stores bay
- P.70/6: Royal Navy bomber variant with crew of three

P.71 -- (Project) 1950 Amphibious feederliner aircraft*
- P.71: 10-12 passenger, 2 x Alvis Leonides radials
-- * Akin to a floatplane Prince variant (??)

P.72 -- (Project) 1951 general-purpose helicopter

P.73 -- (Project) 195? low-speed pilotless target drone*
- P.73: Small pulse-jet powered target drone to U.25/49**
-- * Spec U.25/49 included both drone and launching pad
-- ** Spec U.25/49 cancelled, the replaced by U.120D***
-- *** Won by ML Aviation ML-120D Midget

P.74 -- 1956 8-10 seat, single-rotor jet-tip helicopter
- P.74 : 2 x Napier Oryx NOr.1, AUW 10,000 lbs
-- P.74: Prototype WK998 completed but not flown
-- Also see P.113 for planned R-R RB.108-engined P.74

P.75 -- (Project) 1951 Sea Prince derivative
- P.75: Sea Prince w/ AEW scanner installation

P.76 -- (Project) 1951 twin-rotor helicopter

P.77 -- (Project) 195? Sea Prince deck-landing deriv.
- P.77: Sea Prince transport fitted w/ arrester gear
- P.77: 10 seater, 2 x 550 hp Alvis Leonides 125s

P.78 -- (Project) Military helicopter

P.79 -- (Project) 1951 Army AOP helicopter
- P.79: Aerial Observation Post, crew of 3

P.80 -- (Project) 1951 2-seat, twin-jet military trainer
- P.80: 2 x 1,050 lbf (?) Armstrong-Siddeley Adders*
-- * Adder ASA.1 turbojet eff. Mamba w/o gearbox

P.81 -- (Project) 1951 Pembroke navigational trainer
- P.81: As P.66 Pembroke C.1 except for 19.50 span

P.82 -- (Project) 1952 2-seat, single-engined gunnery trainer
- P.82: Low-wing aircraft with a tricycle undercarriage.
- P.82: Armament 4 x .303-inch guns, 1 x Alvis (??) engine

P.83 -- (Project) 195? single-seat, rocket-powered interceptor
- P.83/1: Modestly forward-swept wings, wingtip fuel tanks

P.84 -- 1954 Jet Provost ab initio jet trainer

P.85 -- (Project) 195? large commercial passenger helicopter
- P.85 : 40-56 pax (depending on route), torqueless rotor
- P.85 : 2 x Napier Oryx N.Or.101 gas generators
-- P.85: Intended as large passenger-carrier for BEA

P.86 -- (Project) 1952 commercial winged compound helicopter
- P.86 : 40-56 pax (depending on route), torqueless rotor
- P.86 : 4 x Napier Oryx N.Or.101 gas generators
-- P.86: Intended as large passenger-carrier for BEA

P.87 -- (Project) 1953 high-winged, 36-passenger transport
- P.87: Rough-field capable Douglas Dakota replacement
- P.87: 2 x 750 ehp Napier Oryx buried within wings*
-- * As gas generators driving hollow-bladed pusher props

P.88 -- (Project) Naval jet aircraft

P.88 -- (Project) 1953 naval jet fighter, poss. to N.114T*
- P.88: If to N.114T, 2-seat, day/night fighter with radar
-- * Jan 1951 Royal Navy spec., 14-t shipboard jet fighter
- P.88: If to N.114T, 4 x 30mm Aden gubs + opt'l 4 x AAMs

P.89 -- (Project) 195? 16 passenger feederliner aircraft
- P.89: Development of the Prince/Pembroke
- P.89: 2 x (??) hp Alvis Leonides, span (??) m

P.90 -- (Project) 1954 lightweight AOP helicopter to HR.144T
- P.90: 1 x turbine gas generator (type? jet-tip rotor?)

P.91 -- (Project) 1955 2-seat tip-jet helicopter
- P.91: 2 x Saunders-Roe pulsejets on 2-bladed rotor
- P.91: Army AOP helicopter to Spec. HR 144T
-- Comp'n won by Fairey ultra-light helicopter (ULH)

P.92 -- (Project) 195? twin-turboprop airliner/transport
- P.92: 35 pax (5 abreast) or cargo, rear loading ramp*
- P.92: 2 x Rolls-Royce Dart 511 turboprops, span 34.13
-- * For use as car ferry, low- and high-wings considered
-- P.92: Intended as Douglas Dakota replacement

P.93 -- (Project) Role-specific Provost developments
- P.93: Relatively minor mods to P.56 Provost airframe
- P.93/1 : Casualty evacuation variant, 3 x crew + litter*
-- * Medic seated backwards behind the 2 x flight crew
-- * Stretcher access via hatch in the port rear fuselage
- P.93/? : Ground-attack a/c, underwing rails for 12 rockets
- P.93/? : Light bomber variant, wing mounts, 8 x 20 lb bombs

P.94 -- (Project) 1952-54 VTOL study to Specification ER.143T
- P.94: Capable full transition from level to vertical flight
- P.94: Provost with short, untapered wings, fixed u/c
- P.94: Deflected thrust + lift jets (??), project cancelled

P.95 -- (Project) 195? twin-turboprop 25-passenger transport
- P.95: High-winged pusher-prop airliner, low-set tailplane
- P.95: 2 x Napier E 156/Gazelle turboprops, span (??)

P.96 -- (Project) jet-tip helicopter, P.74 devel.
- P.96: Sources vary on potential military users
-- Royal Navy ASW helicopter, to Spec. HR 146
-- US military customers, presented not accepted

P.97 -- (Project) Naval jet aimed at Spec. M.148T
- P.97: Withdrawn, judge too complex for Percival

P.98 -- (Project) 1954 ASW helicopter, to HR.149 for RCN
-- Bristol Type 193 (RCN 173) also to HR.149 (ASR.326)

P.99 -- (Project) 1954 18-20 seat turboprop transport
- P.99: 2 x (??) shp (??) turboprops, span (??) m
-- Enlarged Pembroke development

P.100 - (Project) 1954 18-20 seat piston-engine transport
- P.100: 2 x Alvis Leonides Majors, span (??) m
-- Enlarged Pembroke development

P.101 - (Project) 30-32 seat 4- radial engined airliner
- P.101: High-wing airliner, like enlarged Pembroke
- P.101: 4 x 505 hp Alvis Leonides, wing span varies*
-- * Span 22.25 m for smaller, 24,000 lb gross variant
-- * Span 29.26 m for larger, 29,300 lb gross variant

P.102 - (Project) 1954 single-rotor helicopter study
- P.102: Gross weight 55,000 lbs

P.103 - (Project) Valetta (and Varsity?) replacement
-- Poss P.107 deriv. proposed to RAF without success

P.104 - (Project) 1954 jet-tip single rotor helicopter
- P.104: P.74 development, with feathering rotor

P.105 - (Project) 1954-45 10-seat helicopter/flying crane
- P.105: 2 x 825 ehp Napier Onyx NOr.4,* 3-bladed main rotor
-- * Onyx gas generator design specific to P.105
- P.105: Alternative rotor ducts comp. to P.74's shared ducts
- P.105: Commercial roles - pax, ambulance, and heavy lift
- P.105: Flying crane deriv.,** prob. same as P.106 (below)
-- ** P.105 flight dynamics were mounted on a separate beam

P.106 - (Project) 1954 P.105-derived flying-crane helicopter
- P.106: Long-legged 'spider-crane' based upon P.105 dynamics
- P.106: 2 x 825 ehp Napier Onyx NOr.4,* 3-bladed main rotor

P.107 - (Project) 1956 Prince/President replacement
- P.107 : Initial concept, high-winged twin R-R Darts
- P.107 : Revised concept, twin rear-mounted turbojet engines
- P.107 : 2 x Bristol-Siddeley Orpheus; 40-to-50 pax
- H.107 : 1958 Hunting desig., 2 x BS.75 turbofans, 48-seater
- P.107M: 1960 BAC project as Varsity/Valetta repl.

P.108 - (Project) 1954 enlarged P.105 helicopter dev.
- P.108: Larger, 14 seat P.105, 3-bladed main rotor
P.108: 2 x 825 ehp Napier Onyx NOr.4 (as P.105)

P.109 - (Project) 1955 airfield runway barrier

P.110 - (Project) 1956 20-passenger turboprop airliner
P.110: 2 x 825 shp Napier Onyx turboprops

P.111 - (Project) 195? 4-seat jet-propelled communication a/c
- P.111: Adaptation of basic P.56 Provost T.1 airframe
- P.111: 2 + 2 layout military comms w/ rear baggage compart.

P.112 - Camera installation for Belgian Pembroke

P.113 - (Project) 1957 single-rotor jet-tip helicopter
- P.113: Single-engined a/c derived from twin-jet P.74
- P.113: 1 x Rolls-Royce RB 108 gas generator
-- P.113 cancelled in UK helo. industry rationalisation

P.114 - (Project) helicopter (??) x Rolls-Royce RB 108
- P.114: Poss. tandem-rotor crane/pod for Silver City Airways (??)

P.115 - Jet-flap research, JFR1-JFR13 (studies?)

P.116 - (Project) 1956 20-24-seat* jet-powered feederliner/bizjet
- P.116: aka Hunting H.116, several variants studied
- P.116/1: 2 x 2,400 lbf BS Viper 10 turbojets, 20 pax
- P.116/2: 2 x de-rated BS Orpheus turbojets, 24 passengers
- P.116: Rear-mounted engines, T-tail, slightly-swept wings
-- * 4-abreast seating, ** high or low wing designs considered

P.117 - (Project) 1956 executive jet based on P.116/2 (above)
- P.117: 2 x de-rated BS Orpheus turbojets, 21 passengers

P.118 - (Project) Higher-capacity President fuselage-stretch insert
- P.118: Design evolved, rev. wing incidence, engine nacelle pos., etc.
- P.118: aka Hunting H.118, eclipsed by Hunting H.129 project (qv)

P.119 - (Project) 1956 18-pax piston-engined airliner
- P.119: High-winged transport a/c, 3-abreast seating
- P.119: 4 x (??) hp DH Gipsy Queens, span (??) m

P.120 - 195? MKIII airfield runway barrier

P.121 - (Project) 1957 jet-flap research (blown flaps) a/c
- P.121: Single-seat, delta-winged, gross weight 60,000 lbs
- P.121: 2 x DH Gyron Junior turbojets, span (??) m

P.122 - (Project) 1957-58 jet-flap research (blown flaps) a/c
- P.122: Delta-winged design, aka Hunting Percival H.122
- P.122: 2 x DH Gyron Junior turbojets, span (??) m

P.122 - (Project) 1957-58 jet-flap research (blown flaps) aircraft
- P.122: Delta-winged design, 2 x DH Gyron Junior turbojets
- P.122: aka Hunting Percival H.122

P.123 - (Project) 195? jet-flap research (blown flaps) transport
- P.123: 4 x Rolls-Royce RB.108 turbojets, span (??) m
- P.123: aka Hunting Percival H.123

P.124 - (Project) 195? twin-turboprop twin-boom transport a/c
- P.124: Troop transport/cargo carrier, rear fuselage loading
- P.124: 2 x General Electric T58 turboprops, span (??) m
- P.124: 2 x 1,100 shp Armstrong Siddeley P.182 turboprops
-- P.124: Passenger transport, 18 passenger seats
-- P.124: Troop transport, 23 seats for equipped troops
-- P.124: Freighter, (??) payload
- P.124: aka Hunting Percival H.124

P.125 - (Project) 4-seat jet communications aircraft
- P.125: 4-seat Jet Provosot Mk 3 derivative

P.126 - 195? H.126 jet-flap research (blown flaps) a/c, x 2*
- P.126: High-winged, T-tailled w/ jet flaps and jet nozzles
- P.126: 1 × 4,000 lbf BS Orpheus BOr.3 Mk.805, span 15.29 m
-- * Only XN714 was completed, 2nd prototype never finished
- P.126: 2 x lower-fuselage jet pipes + rear pitch/yaw nozzles
- P.126: aka Hunting Percival H.126

P.127 - (Project) Tandem 2-seat jet trainer
- P.127: Jet Provost wings, rear fuselage, empennage

P.128 - (Project) Jet ground-attack aircraft
- P.128: Jet Provost wings, rear fuselage, empennage

P.129 - (Project) Stretched P.66 President transport
- P.129: 2 x R-R Gnome turboprops, span 19.66 m (??)

P.130 - (Project) Shortened military transport, P.107 variant

P.131 - (Project) 1959 STOL/VTOL jet-lift transport
- P.131: Twin-boomed aircraft design

P.132 - (Project) 1959 VTOL freighter aircraft
- P.132: With Circulift wings (blown wings?)

P.133 - (Project) Wingless jet VTOL assault craft

P.134 - (Project) 1960 small twin turboprop aircraft
- P.134: Twin-boom communications/executive a/c
- P.134: 2 x 650 shp (??) Turbomeca Bastan

P.135 - Fairey FD.2 ogee wing conversion, aka BAC 221
- P.135: Also noted as Valetta repl. naval trainer/transport

P.136 - (Project) 1961 V/STOL (military?) trainer aircraft
- P.136: 1 x 7,550 lbf Bristol-Siddeley BS.75 turbofan

H.137 - (Project) Hunting-Percival agricultural aircraft
- H.137 : Conventional tractor layout agricultural a/c
- H.137R: H.137 fitted with rotary distribution system

P.138 - (Project) Pusher-prop variant of P.137 ag. a/c
- P.138: Single-seat agricultural aircraft sprayer
- P.138: 1 x 340 hp (??) Continental GTSIO-520 HO6 pusher

P.139 - (Project) Variable-sweep trainer BS 75
- P.139: Forward-sweeping wings (??)

P.140 - (Project) 1961 jet communications aircraft
- P.140: Swept-wing 6-seater based on Jet Provost

P.141 - Pressurised Jet Provost Mk 5
- P.141: (??) conflicts with P.145, below

P.142 - (Project) 1961 low-wing agricultural aircraft
- P.142: 3 seater, fertilizer hoppers within the wings
- P.142: 1 x (??) hp Pratt & Whitney (type?) engine

P.143 - (Project) Swept-winged Jet Provost

P.144 - (Project) 1961 V/STOL transport aircraft
- P.144: Fan-lift engines mounted in the fuselage

P.145 - Jet Provost T.5 pressurized trainer
- P.145: aka BAC 145

P.146 - (Project) 1962 advanced jet trainer study
- P.146: Low-winged, straight & swept wings consid.

P.147 - (Project) 1962 advanced jet trainer study
- P.147: High-winged, either straight or swept*
-- * 35 degrees of wing sweep considered, 2-seater

P.148 - (Project) 2-seat tandem supersonic jet trainer
- P.148: Fixed- and variable-geometry wings studied
- P.148: 1st part of P.148/149/150 trainer programme
-- P.148: Working model completed?

P.149 - (Project) 2-seat tandem subsonic jet trainer
- P.149: Low wing,* T-tail; various config. studied
-- * A high-speed swept-wing design also considered
- P.149: 2nd part of P.148/149/150 trainer programme

P.150 - (Project) 2-seat elementary jet trainer
- P.150: Side-by-side seating, fixed tricycle u/c
- P.150: 1 x Turbomeca Marboré II turbojet
- P.150: 3rd part of P.148/149/150 trainer programme

P.151 - (Project) Transport, two jets rear-mounted on wing

P.152 - (Project) 195? short-range jet airliner, P.107 class
- P.152: 4 x (??) jets mounted in pairs in over-wing pods
- P.152: Wing from P.116, engine pylons like VFW-Fokker 614

P.153 - (Project) Twin-jet subsonic trainer, fixed wing

P.154 - (Project) jet-flap passenger airliner (BAC 1-11 type)
- -Presumably a spin-off from P.107 (which led to BAC 1-11)

P.155 - (Project) 1962 2-seat supersonic advanced trainer
- P.155: Tandem trainer, co-devel. with English Electric
- P.155: 2 x Bristol-Siddeley Orpheus turbojets, span (??)

P.156 - (Project) 196? Jet Provost mod. as COIN aircraft

P.157 - (Project) 1963 turboprop-powered COIN aircraft
- P.157: Both high- and low winged concepts considered

P.158 - (Project) 1964 2-seat twin-jet engined basic trainer
- P.158: 2 x Turbomeca Aubisque turbofans, span (??) m

P.159 - (Project) Twin turbofan Jet Provost deriv.
- P.159: 2-seat trainer w/ jets mounted in rear fuselage
- P.159: 2 x 1,635 lbf (??) Turbomeca Aubisque* turbofans
-- * Bastan turboprop derived low-bypass turbofan

P.160 - (Project) 196? twin-turboprop COIN aircraft
- P.160: 2-seat tandem crew arrangement
- P.160: 2 x Turbomeca Astazous mounted in tail

P.161 - (Project) Side-by-side seat COIN aircraft

P.162 - (Project) Basic trainer similar to P.158
- P.162: Jet Provost cockpit, wings, tailplane/fin

P.163 - (Project) Twin-engined COIN aircraft

P.164 - (Project) BAC 164 jet ground attack aircraft
- BAC 164: Jet Provost T.4 fuselage, wing hard points*
- BAC 164: 1 x 3,410 lbf Bristol-Siddeley Viper 522
- BAC 164: Hunting-Percival proposal for Malaysia
-- * Revised tail surfaces resembling BAe Hawk

P.165 - (Project) 196? twin-engined COIN aircraft
- BAC 165: Twin-engined Jet Provost deriv.
- BAC 165: 2 x (??) engines, span (??) m

P.166 - BAC 166, uprated Jet Provost trials a/c
- BAC 166: Mod. 2nd prototype Jet Provost T.5, XS231
- BAC 166: 1 x 3,410 lbf Bristol-Siddeley Viper 522
- BAC 166: PV trials a/c for BAC 164 and BAC 167 development
- BAC 166: Civilian reg. G-ATAJ reserved but never taken up
-- BAC 166: Eval. Luton, AA&EE, RAE, stored 5MU RAF Kemble
-- BAC 166: XS231 fuselage preserved, under restoration

P.167 - 1966 BAC 167 Strikemaster Jet Provost devel.

P.168 - (Project) Large military load carrying Jet Provost
- P.168: was to be a modfied and stretched P.164 airframe

P.169 - (Project) Pembroke deriv. Airborne Early Warning
- H.169: Twin turbofan Pembroke C.1 with large radome*
- H.169: 2 x 4,320 lb Lycoming PLF1A-2** high-bypass turbofans
- H.169: Planned to fly by Dec. 1966 but abandoned; aka BAC 169
-- * AEW radar radome mounted above fuselage
-- ** PLF1A-2 was related to mil. YF102 & civil ALF502D

P.170 - (Project) P.164/BAC 164 with R-R RB 172 Adour turbofan

P.171 - (Project) P.164/BAC 164 with R-R RB 152-61 (sic)*
-- * Perhaps a typo for an Adour variant, 'RB 172-61' (??)

P.172 - (Project) 1965 twin turboprop COIN aircraft/Transport
- P.172 : P.165 deriv., (??) unknown engine type, span (??) m
- P.172/1: 1965, 2 x Turbomeca Bastan turboprops
- P.172/2: 1965, 2 x Bristol-Siddeley Viper turbojets

P.173 - (Project) 1965 twin-turbojet COIN aircraft
- P.173 : 1065 P.165 deriv., 2 x BS Viper turbojets

?? Hunting-Percival Harrier - 1957 folding utility vehicle for Airborne use


* It has also been suggested that P.117 might be Edgar Percival's Gull Jet design. However, most of Percival's later designs received 'EP' designations out of sequence with the Percival/Hunting/BAC series.
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Great work, Apophenia!

I don't have my Percival list with me at the moment, but be sure that I will retrieve it tonight and compare it with yours. Of course I will let you know if I see any differences or have any questions.
First of all, let me say your list is great! On the whole I couldn't find much missing there, and in some cases you allowed me to add a little flesh to some entries that previously had only one word or two... Anyway, here are a few remarks:
  • P.1 - If I add up the amounts built for P.1 to P.1E, I still fall short of two aircraft out of the total built. A mistake somewhere? Another undocumented variant?
  • P.3 - I found mention of a "P.3A" but haven't got any details about what it could have been.
  • P.4 - You list it as a twin-engine transport... I have it as a sports aircraft project... I also found mention of a "P.4A" but haven't got any details.
  • P.6 - I also have a "P.6A Mew Gull IIA" but don't know exactly what it was.
  • P.8 - There was also a P.8A, which was the twin-float version; both projects were submitted to Q.32/35 (OR.29) and designated as the Type J.
  • P.9 - You list it as a twin-engine transport... I have it as a sports aircraft project! Was the designation reused at some point?
  • P.10 - Sub-versions known as P.10A, P.10B Vega Gull II, P.10C Vega Gull III.
  • P.12 - One of these was ordered as communications aircraft for 20/38, cancelled later.
  • P.13 - A P.13A variant has also been listed.
  • P.17 - Also appears as the P.16e in some sources.
  • P.19 - Was there also a project for a light bomber version for China? Or is it simply a confusion with P.29?
  • P.21 - According to my list, the P.21 was to me an elementary trainer, and only the P.21A was the target variant. Who's right? Who's wrong?
  • P.22/P.23 - In some sources, both were first submitted to T.1/37 (OR.46); P.22 was then submitted to Q.8/37 (OR.48) and P.23 to T.7/37 (OR.47).
  • P.24 - No details either. A real mystery!!
  • P.25 - Apparently was submitted to both S.23/37 (OR.52) and S.24/37 (OR.53).
  • P.26 - A "P.26A" variant has been quoted as a test-bed.
  • P.50 - I also have a "Prince IIIE" as an executive transport version (possibly only a project).
  • P.66 - I have that designation as covering also the Sea Prince T.1, C.1 and C.2.
  • P.87 - I have it as a 1955, not 1954 project.
  • P.117 - My list also asks the question as to whether this was the Gull Jet...
  • P.172 - I also have the two different descriptions under that number. Possibly to variants of the same project?
Thanks Stéphane! Many of your details have now been added to the list. My comments in return:

I originally listed a few of those lettered subtypes but there rarely seemed to be published details of their distinctions :-\ Still, might as well add 'em to see if someone can fill in some of those blanks later.

P.19 - I took this to be confusion with P.29 (as someone said, hard to imagine a 'light' 4-engined bomber!).

P.21 - remains a puzzle. The mid-winged description seems inappropriate to an elementary trainer. I'm assuming confusion between P.20 and P.21.

P.66 - Interesting. Perhaps the Sea Prince began life as the P.57 but later received the Pembroke's designation?

P.87: The P.87 concept was illustrated in Flight, 3 Sept 1954
Ack! Just noticed that the P.87 is featured in Flight, 11 Sept 1953 !

BTW, does anyone else have Flight Archive's PDFs refusing to load for them?
Has anyone been able to locate any amount of information on P.52 and P.53, the only as-yet undocumented designations in the list?
I have just received the book "On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 978 0 85130 448 9).

It answers some of the questions thrown up by Skyblazer back in 2012 in its Percival Designations chapter.

- P.3A -- Gull Six (Type D) with 205hp Gipsy Six II engine
P.4 -- Low-wing twin-engine transport with 8 to 10 seats with 2 x Aquila engines - project 1935.
- P.4A -- Low-wing twin-engine transport with 8 to 10 seats with 2 x Pratt & Whitney Twin Wasp engines - project 1935.
- P.6A -- Mew Gull Mk IIA (Type E) registered G-AFAA - 205hp Gipsy Six R engine - 1938.
- P.13A -- P.13 with variable pitch propeller from 1935, project only.
- P.16E -- Q.6 Mark V production machines for RAF (Specification 25/38) and Egyptian Air Force, 1936.
P.17 -- Q.6 Mark IV for Air Survey, project only 1936.
P.21 -- Radio-controlled mid-wing target floatplane (Specification Q8/37) from 1937, project only.
- P.21A -- Project for P.21 with a shoulder mounted wing, 1937.
P.22 -- Project for RAF communications aircraft (Specification T7/37), project 1937 with 2 x Gipsy Six II, 205hp.
P.23 -- Project for RAF communications aircraft (Specification T7/37), project 1937 with 2 x Pobjoy Niagara V, 130hp.
- P.23A -- Project for RAF communications aircraft (Specification T7/37), project 1937 with 2 x Gipsy Major I, 130hp.
- P.23B -- Project for RAF communications aircraft (Specification T7/37), project 1937 with 2 x Gipsy Major II, 140hp.
P.24 -- Project for mid-wing twin-engine transport, 1937. 2 x 925hp Pegasus XX and 14 passengers.
- P.24A -- Project for low-wing twin-engine transport, 1937. 2 x 925hp Pegasus XX and 14 passengers.
- P.26A -- 2300hp Centaurus test bed P.26.
P.50 (Exec version) -- Prince Mk. 1B Executive Transport only exec version mentioned.
P.116/1 -- Project for general purpose jet transport, 1956 with 2 x Viper 10 engine (2400 lb st). 20 passengers.
P.116/2 -- Project for general purpose jet transport, 1956 with 2 x Bristol Orpheus de-rated engines. 24 passengers.
P.117 -- Project derived from P.116/2 executive jet of 1956 with 2 x Bristol Orpheus de-rated engines. 21 passengers.
P.172 -- Twin turboprop COIN or Transport project, 1965. No engine noted.
P.172/1 -- Developed from the P.165 project, 1965. 2 x Turbomeca Bastan turboprops.
P.172/2 -- Developed from the P.165 project, 1965. 2 x Viper turbojets.
P.173 -- COIN aircraft developed from the P.165 project, 1965.

Other notes:

In the book the Percival P.nnn designations extend from P.1 to P.119.

The Hunting numbers run from H.120 to H.165 (in the Apophenia's list as P.120 to P.165).

BAC numbers are given for the type 166 and 167.

The Hunting numbers continue from H.168 to H.173 (in the Apophenia's list as P.168 to P.173).

P.52 and P.53 are unknown in that publication as well!
Brilliant stuff, Cy-27... Thank you so much for your contribution!
Thanks for the additional info Cy-27...
Can you tell us a bit more about the unbuilt projects in
the new Percival book you have ...?
Thanks in advance.
In response to Lark's request, here are some details on Percival projects... more later


Also known as the Percival Type G. Designed as a two seat cabin aircraft with a strut-braced high wing. On top of the wing was a braced Pobjoy engine mounted a pusher. The engine was to the rear of the side-by-side cabin. It had a simple fixed landing-gear with a single nose-wheel. the fuselage was very thin and rectangular, leading to a conventional tail arrangement.

Engine 1 x Pobjoy (86 hp)
Wingspan of 36 ft
Length of 25 ft
Maximum weight 1,450 lb
Cruise speed 85 mph


NB This entry is at odds with notes in the earlier lists but I have included the source entry.

Also known as the Percival Type R. The P.18 was designed in 1937 as the answer to a specification for a medium-range airliner from Imperial Airways. The 6-10 seater resembled a smaller version of the twin engine de Havilland DH95 Flamingo (which itself appeared at the end of 1938). A braced high-wing configuration and twin fin tail. It had a spatted fixed tail wheel. There were two sub-projects for slightly larger versions, the P.18A and P.18B.

Engine 4 x de Havilland Gipsy Six engines (205 hp each).
Span 60ft
Length 44 ft 9 in
Gross weight 8,550 lb
Cruise speed 167 mph


First of two enlarged P.18 designs. Powered by six-cylinder engines.

Engine 4 x [Menasco?] Buccaneer (200 hp)
Span 60 ft
Length 47 ft 9 in
Gross weight 10,000 lb
Maximum speed 193 mph


Second of two enlarged P.18 designs.

Engine 4 x [Wolseley?] Scorpio II (290 hp)
Span 60 ft
Length 47 ft 9 in
Maximum speed 171 mph


Also referred to as the Percival Type Aa. A 1940 design for single-seat, single engine monoplane fighter aircraft. Four 0.303 in Browning machine guns buried within the low-set cranked wing. Nose mounted radiator like the later Hawker Typhoon and Tempest.

Engine 1 x Rolls-Royce Merlin (1,300 hp)
Span 40 ft 2 in
Length 30 ft 2 in
Gross weight 6,286 lb
Maximum speed 352 mph


In the middle of the 1950s, Hunting investigated a range of aircraft designs to replace the Percival Prince and President models. Initially the designs focused on a Fokker Friendship arrangement with Rolls-Royce Dart engines. Soon the evaluation and analysis led to using turbojet engines.

The P.107 was in the 40-50 seat range and had a pair of Bristol-Siddeley Orpheus engines mounted to the rear of the fuselage. A layout that was later used in the One-Eleven, Caravelle and DC-9. This engine location reduced the noise within the fuselage cabin. Eventually the design was stretched when BAC inherited the design in 1960. Eventually the One-Eleven design was selected for production and work on the P.107 design was dropped. In 1960, the P.107M was proposed as a replacement for the Vickers Varsity and Valetta, although this was not proceeded with,


The P.130 was another derivative of the H.107 with a shorter fuselage.


This was a project for a short-range airliner utilising the wing design of the earlier P.116. It had four small jet engines, mounted in pairs, in over-wing pods. this was a similar configuration to the later VFW-Fokker VFW-614.


"On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 9780851304489).
Thanks for the info and all the work you
have done Cy...
... more Hunting/Percival projects ...


Also known by the Percival Type J designation. Work started in 1935 on an eight seat commercial transport. A low-wing monoplane design with two Gipsy Six engines and was a predecessor of the Type Q series which entered production later.

Engine 2 x de Havilland Gipsy Six I (200 hp)
Wing span 50 ft
Length 36 ft 3 in
Cruising Speed 152 mph
Gross weight 5,500 lb


The 1951 P.81 was a proposed development of the Percival Pembroke as a navigational trainer variant. The fuselage and appearance remained largely unaltered. The design did feature a greater wing span.

Wing span 64 ft


Hunting-Percival started this design to provide a candidate for an Air Ministry Specification HR 144T for a two-seat Air Observation Post and liaison helicopter for the British Army. The design was to incorporate a pair of Saunders-Roe pulse jet in the rotor tips to provide the power source. The twin-bladed machine had a pair of skids with a small central wheel at the mid-point of each. The competition was won by the Fairey Ultralight design and the P.91 was dropped.


A design for a Douglas DC-3 replacement. It was a twin turboprop design with both high and low wings considered. The design was interesing in that it was to have a rear loading ramp similar to the type found on the Antonov An-24/26 designs. This feature was to allow the type to be used as a car ferry transport. The cabin was to carry up to 35 people in its passenger form. The seating was to be 5 abreast (2 + 3) in seven rows. The undercarriage was very close to the fuselage.

Engine 2 x Rolls-Royce Dart 511 Turboprops
Wing span 112 ft
Gross weight 28,000 lb to 33,000 lbs


Based on the P.56 Provost T.1, this design was a proposal for a military communications aircraft. It was envisaged as a four-seat aircraft, two at the front and two to the rear. It was also to have a rear baggage compartment. The design got as far as to specify uphostered seating from the well-known Rumbold company.


This was a project to re-design the P.74 helicopter around 1957. Following the rationalisation of the British helicopter industry, it was cancelled.

Engine 1 x Rolls-Royce RB.108


Also referred to as the P.116. In 1957 Hunting designed a small jet transport aircraft aimed at the feeder airline and corporate jet market. Seating for up to 20 passengers with four abreast seating. It had a 'T' tail and a pair of rear-fuselage mounted engines. The wings were slightly swept. Several options were considered for variants with both high and low wings. Large forward access door on the port-side of the fuselage.

Engine 2 x Bristol Viper 10 or de-rated Orpheus Turbojets


A design project to stretch the fuselage of the Percival President design to create a higher capacity version. During the design work, the wing incidence changed along with the position of the engine nacelles. Although not continued, some of the features were carried forward to the Twin-Gnome H.129 project.

"On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 9780851304489).
... more Hunting/Percival projects ...


This project was also referred to as the Percival Type F. It was a design for an eight to ten seat low-wing monoplane commercial transport. There were two variants the P.4 and the P.4A and differed only by their engines. It had retractable undercarriage and a forward sloping cockpit windscreen.

Engine 2 x Aquila (500 hp)
Wing span 61 ft 4 in
Length 42 ft 3 in
Cruising speed 195 mph


A design for an eight to ten seat low-wing monoplane commercial transport. Similar to the P.4 but with a different type of engine installed.

Engine 2 x Pratt & Whitney Twin Wasp (700 hp)
Wing span 61 ft 4 in
Length 42 ft 3 in
Gross weight 9,000 lb


A project dating from 1935 for a twin-engine trainer. It was to meet an Air Ministry Specification 23/36. It was not built (aka Percival Type L).

Engine 1 x de Havilland Gipsy Six II (205 hp)
Wing span 50 ft
Length 34 ft 10 in
Gross weight 5,000 lb
Maximum speed 176 mph


A 1935 project for a single-engine tandem seat trainer. It was a low-wing monoplane and had a Gipsy Major engine. The project, which was also known as the Percival Type M, was not built.

Engine 1 x de Havilland Gipsy Major I (130 hp)
Wing span 35 ft
Length 25 ft 7 in


A 1939 project also known as the Percival Type Z. This project was a four to eight seat amphibian with two engines mounted above the high wing on a pair of pylons. The aircraft was designed for the Canadian wilderness conditions but development was eventually abandoned and no prototype built.

Engine 2 x de Havilland Gipsy Six II (205 hp)
wing span 48 ft
Length 40 ft
Cruising speed 145 mph
Gross weight 5,700 lb


A 1943 project also known as the Percival Type Af. Design started when it appeared the fortunes of war were swinging in favour of the allies. It was conceived as a large post-war freighter designed to cruise at around 170 mph. Powered by four Bristol engines the aircraft was to be a semi-flying wing with twin boom pylons following on from the pre-war Burnelli concepts. the wing was to be so thick that a man could stand upright inside the wing. It was a project that remained on the drawing board.

Engine 4 x Bristol Centaurus
Wing span 140 ft
Length 103 ft
Cruising speed 169 mph
Gross weight 120,000 lb


A project from 1943 for a 8 to 10 seat twin-engine pusher transport. A high wing design, the engines were located to the rear under each wing. Entrance door was on the port side just behind the cockpit. May have been the design also known as the Percival Type Ai.

Engine 2 x Alvis Leonides (505 hp)
Wing span 52 ft
Length 47 ft 10 in
Cruising speed 175 mph

P.43 Peewit

A 1944 project, also known as the Percival Type Aq, for a civil version of the Proctor IV. A four-seat machine, it was even given a name Peewit as part of the Gull family. The concept was abandoned in favour of the Percival Proctor V design.


A commercial project derived from the P.74 helicopter with work on the design started in 1954. It was to be a general purpose ten seat helicopter with a first flight date of 1958. central to the P.105 concept was the idea of a universal power and rotor unit with driving force of a pair of gas producing Napier Oryx NOr.4 turbine engines. These were mounted on the outside of the main pylon. The various commercial applications such as passenger, heavy lift and ambulance were to be fixed to this central power hub as fuselage modules. The passenger module had a forward cockpit and conventional fuselage with a four single-wheel undercarriage, this configuration being exhibited at the 1955 SBAC Show, Farnborough. In December 1955, full design work was in progress and the prototype rotor was being built. A lot of the development work was dependent on the knowledge gained from the P.84. Due to its lack of success, the P.105 was abandoned the next year.

Engine 2 x Napier Oryx NOr.4 turbine (825 hp)


1954 saw Percival's consider another project based on the P.105 concept of modules. The P.106 was described as a spider-crane. It was to utilise the same universal power and rotor unit. An operator cockpit was located under the power unit with a very long legged undercarriage (similar to that which appeared a few years later on the Soviet Mil Mi-10). A power winch system was located beneath the operator to handle under-slung loads. abandoned with the failure of the P.84 helicopter.

Engine 2 x Napier Oryx NOr.4 turbine (825 hp)

"On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 9780851304489).
Very nice my dear Cy-27,

can you open a new topic and send some drawings to those projects ?.

Percivals P.93 dsignation covered a number of new roles based on the P.56 Provost. These included:
- P.93/1 A casualty evacuation version with a medic seated backwards behind the two crew with a stretcher in the rear fuselage. The stretcher was to be loaded through an external hatch in the port rear fuselage.
- P.93/? A ground attack aircraft with underwing rails for 12 rockets.
- P.93/? A light bomber with underwing armament of 8 x 20lb bombs.


The firm examined the possibility of a VTOL aircraft to meet Air Ministry Specification ER.143T, dated 25 September 1952. It was to be capable of full transition from level to vertical flight. In 1954 Shorts were awarded the contact and the SC.1 was built instead. Project cancelled.


An attempt by Percival for a transport aircraft with a capacity 25 passengers. It featured a high wing and two pusher turboprops. Tail reminiscent of a Handley Page Herald. The aircraft sat very low to the ground. Gross weight was estimated at 26,000 to 28,000 lb.

Engine 2 x Napier Gazelle turboprop or Napier 156 turboprops


This was a project developed from the P.74 helicopter utilizing ducted power. Its target market was the US military who showed little interest and the project did not proceed.


A passenger airline project with 30-32 seats. Another high wing design with four radial engines. Nosewheel undercarriage with a passenger door to the rear of the fuselage on the port side. Several versions were considered, the smallest of which was 24,000 lb gross with 73 ft wing span and the largest at 29,300 lb and 96 ft span.

Engine 4 x Alvis Leonides radial pistons


"On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 9780851304489).

A design also known as the Percival Type Z dating from 1939. It was a design for a four to eight seat amphibious transport with two engines monted above the wing. It was intended for operations in Canadian-type conditions but no prototype was built. Two floats located under the mid-wing. Braced cruciform tail.

Engines: 2 x de Havilland Gipsy Six II (205 hp each)
Wing Span: 48 ft
Length: 40 ft
Gross Weight: 5,700 lb
Cruise Speed: 145 mph


A heavy bomber design also known as the Percival Type Af dating from 1943. It was a Burnelli-type blended wing freighter, powered by six Centaurus engines. Twin booms extended to the twin tail. Never completed.

Engines: 6 x Bristol Centaurus (2,500 hp each)
Wing Span: 158 ft
Gross Weight: 150,000 lb


A heavy bomber design also known as the Percival Type Ag dating from 1943. It was a design based on the earlier P.35. Powered by four Centaurus engines which unfortunately gave a low speed. Like the similarly sized P.35 it was not built.

Engines: 4 x Bristol Centaurus (2,500 hp each)
Wing Span: 140 ft
Length: 103 ft
Speed: 169 mph


A project for a proposed airliner for 2 crew and 20 passengers dating from July 1945. It was designed to meet the Brabazon Committee's Type 5A recommendation. This called for a four engined pressurized aircraft for short and medium range routes. The passenger cabin was fully sound proofed. An all-metal design, with a tricycle undercarriage with a steerable nosewheel. It was to be equipped with the latest radio, radar and deicing gear. The Gipsy Queen engines had reverse-pitch propellers. Another version was considered with Bristol Perseus (1,000 hp) engines. The Percival P.41 was also known internally as the Al and although detail design was comleted, it did not go into the manufacturing stage.

Engine: 4 x de Havilland Gipsy Queen 71
Wing Span: 55 ft 8 in
Length: 67ft 6 in
Crusing Altitude: 15,000 ft
Range: 750 miles (with 14 passengers or 4,200 lb freight)
Landing Run: 2,250 ft
Take-off Run: 3,600 ft
Rate of Climb: 900 ft per minute


A project, also referred to as the Percival Type Am, for an airliner designed to meet the Brabazon Committee's Type 5A recommendation. It was a larger version of the P.41 and was a 20 seat transport. Both Westland (a 12-seater) and Armstrong-Whitworth were also in the Brabazon competition alongside Percival's but a revision took place in August 1946 and the specification appeared to be written around the Miles Marathon that was selected.

Engine: 4 x Alvis Leonides (505 hp)
Cruising Speed: 187 mph
Wing Span: 69 ft
Length: 55 ft 6 in
Gross Weight: 18,524 lb


This was a jet-flap research program by Hunting Percival which ultimately appeared as the H.126 design.
In 1957 and 1958 they examined the H.122 delta wing design, powered by two Gyron engines. Various wing shapes and ducting systems were also investigated. Did not proceed beyond the research phase.

Engine: 2 x de Havilland Gyron Junior.


Closely related to the H.122 jet-flap investigations this was a transport aircraft with four RR engines and jet flaps. Did not proceed beyond the research phase.

Engine: 4 x Rolls-Royce RB.108.


The Hunting Percival H.124 military transport never got off the drawing board. It had a similar configuration to the French Nord N.2501 Noratlas with a pod like fuselage and twin booms to the tail.A rear door could open to allow the loading of freight. Another role was that of an 18 seat passenger transport or as a troop transport for 23 equipped troops. The aircraft had very small wheels for the size of the aircraft and sat very low when on the ground.

Engines: 2 x T58 turboprops or Armstrong Siddeley P.182 engines.


"On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 9780851304489).

Known internally as the Percival Type P design. It was a project dating from 1935 for a high wing four engine airliner transport monoplane. It was to have a capacity of 14 seats and have retractable landing gear.

Engines: 4 x Rapier VI engines (395 hp each)
Span: 77 ft
Gross Weight: 15,170 lb
Cruising Speed: 192 mph


Known internally as the Percival Type X design. It was a project dating from 1937 to meet an Air Ministry Specification (S.23/37) for a Special Observation Naval aircraft. This spec was part of the Operational Requirement OR.52 to shadow ships by night. It was a three seat pusher which was to operated from aircraft carriers. It was to fly at low speeds (@38 knots) with a 6 hour duration. The P.25 also had folding wings. The project was abandoned when no suitable engines were found to be available. The aircraft that were ordered under the specification were the General Aircraft GAL.38 and Airspeed AS.39.


This was a post-war project for a variant of the Merganser transport. It was to have 5-8 seats but be fitted out as a dedicated survey aircraft with special fittings and equipment. It was abandoned when the Merganser project was cancelled.


Low-wing twin engine executive aircraft. After World War II Percival's examined a number of types which they thought would appeal to the civil aviation market. One of these was the 1947 design of the P.51. The aircraft had 5 seats, retractable tricycle landing gear and this light-twin piston shared some similarities with the Q.6 design. The cabin door was located to the rear of the cockpit and access was via the wing.

Engines: 2 x de Havilland Gipsy Major II (140 hp)


A light twin-engine low-wing private aircraft developed post war. Fitted with retractable tricycle landing gear and had the same basic arrangement as a Beagle 206 (but smaller). The cabin was a raised bubble type and provided good all round vision. The cabin had the entrance door on the port-side.

Engines: 2 x de Havilland Gipsy Major


Derived from the Merganser and Prince aircraft, one of a series of sub-developments for a light transport aircraft. A simplified version of the Prince with two Leonides radial engines. It also had a fixed tricycle undercarriage and passenger seating for 14 passengers. The design had restricted luggage capacity with a designated area at the rear of the main cabin. The type was also to have a nose baggage compartment for carrying mail.


Like the P.64 this was derived from the Merganser and Prince line and had a fixed tricycle undercarriage. Power was from four de Havilland Gipsy Major engines. The additional engines resulted in a redesigned wing with a constant chord inner-section and tapered outer panels. Eighteen passengers could be carried.


This was a Percival proposal from January 1950 to meet an Air Ministry Specification A.20/49 to meet Operational Requirement 270 for an Air Observation Post. It was an alternative design to the P.68 when a specification amendment meant a high wing design was not essential to the submission. The Auster AOP.9 was selected.


Originally a twin-engine ship-borne Anti-Submarine Warfare aircraft which remained a project. Developed in response to a Royal Navy requirement in 1950. Similar layout to the de Havilland DH.103 Hornet this design was powered by a pair of Alvis Leonides radials. The aircraft was to have folding wings and a retractable undercarriage with a tail wheel. A crew of three would be carried. The basic design was to be available in two versions:
  • ASW version - with Anti-submarine equipment and ordnance.
  • Torpedo version - with torpedo to be carried in a streamlined belly stores bay.
"On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 9780851304489).
Percival P.21

Also known as the Percival Type T. Percival produced the design for a radio controlled target aircraft for the Royal Navy to meet Spec. Q8/37 dated 15/06/1937. Two variants (see also,18028.0.html). Both powered by 205 hp de Havilland Gipsy Six II engine with a wingspan of 26.5 ft.

Mid-wing version ("First version" in Hesham's link,18028.msg243635.html#msg243635), weighed in at 2,473 lb and had a maximum speed of 181 mph.

The shoulder wing version ("Revised" in Hesham's post) had wing floats deleted and had stub wing/sponsons instead.

The Spec. had called for a hulled floatplane of wood construction with the ability to land, taxy and be towed on the water.
The type was to be catapult launched from a ship. It was to have folding wings and have the capability to carry a pilot if necessary. A four hour endurance was required.

The Airspeed AS.37 (radio controlled flying boat) and GAL.35 were also submitted but none were selected.

"On The Wings of A Gull (Percival and Hunting Aircraft)" by D.W.Gearing (Air Britain - ISBN 9780851304489).
From Air Pictorial 10/1956,

here is a more info about P.86.


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