Seversky/Republic AP series - AP-1 to AP-100

Thank you my dear Apophenia,

but you forget a VB-VT proposal,and for SEV-7.
 

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hesham said:
... but you forget a VB-VT proposal...
Click to expand...

Sorry hesham, I'm not following you on the VB-VT proposals.

Do you mean that there is an actual (or plausible speculation on a) SEV series designation for the Seversky VB-VT proposals?

On the blueprint documents, those VB-VT proposals, are identified only as 'Proposal 1' and 'Proposal 2' (or, in the title, as "Proposal no. 1 and no. 2"). What am I missing?

BTW, on my second SEV-7 entry, I have listed the actual output of that aircraft's individual R-1830-9 engine. Your snippet lists the performance promised by Pratt & Whitney for that model of Twin Wasp. Alas for Seversky, the R-1830-9 which P&W provided proved incapable of delivering 850 hp.
 
Apophenia said:
BTW, on my second SEV-7 entry, I have listed the actual output of that aircraft's individual R-1830-9 engine. Your snippet lists the performance promised by Pratt & Whitney for that model of Twin Wasp. Alas for Seversky, the R-1830-9 which P&W provided proved incapable of delivering 850 hp.
Click to expand...

My dear Apophenia,

that's from the book, The American Fighter ?.
 
Hi,

I want to make a complet list to this company with some of
my speculations to the gaps,but with very Strict measures,
for example;

AP.XX ? was unknown ?,but could it be ..........,need confirm

But I hope no objections,you can introduce alternatives or
corrections, may I ?.
 
hesham said:
I want to make a complet list to this company with some of my speculations to the gaps,but with very Strict measures, for example;

AP.XX ? was unknown ?,but could it be ..........,need confirm

But I hope no objections,you can introduce alternatives or corrections, may I ?.
Click to expand...
I for one strongly object to any list filled with speculations.
In my opinion it would be a better solution to just list the ones that are certain, and add a second list below of all the undetermined designations.

Also, I don't like the idea that one person offers a would-be "definitive" list. We all make lists, we all have stuff the others don't, and it's interesting to be able to compare and discuss.
For what it's worth here is my own list, which hasn't been reworked in years and can probably be improved upon.
You can add your own list in the next post, and others can add theirs.

AP-11937SEV-1XP modified as SEV-7 then as AP-1; became the prototype for the P-35; also modified P-35 for trials [NR1390][1]
EP-1GUARDSMAN. Export version of P-35 ("EP" for export pursuit); diverted to USAAC as the P-43A.
EP-1-1061939GUARDSMAN. New designation of EP-1 in USAAC service (also found as DS-1, Republic Model 106 and "AP-35"!). Became RP-35A
AP-21937Racer [R1250]; proposed as pursuit with flush, rectracting gear, lost out in 1937 competition1
AP-21939XP-41; a P-35 modified with new streamlined canopy, a Wright R-1830-19 engine with a two-speed supercharger, and revised landing gear[1]
AP-3Pursuit proposal, an unbuilt P-35 version with liquid cooled Allison V-1710 engine, abandoned in favour of AP-4
AP-41939XP-43-RE LANCER. Adaptation of P-35 [NX2597]. Procured as P-43 series.1
AP-4(A)1940YP-43 LANCER. Pre-production version of AP-4 prototype delivered in September 1940 (13 built)
?P-43 LANCER. Production version (80 built?). Also P-43, (R)P-43A, P-43A/B/C/D/E
?P-43A-1 LANCER. Production version for RAF, sent to China and India (125 built).
AP-4J1939P-44-1 ROCKET proposal. 400 hp Pratt &Whitney R-2180-1; 80 ordered in Sept 13,1939 as the P-44; cancelled and transfered to P-430
AP-4BXP-44 project; was to incorporate the R-2180 engine; cancelled
AP-4CP-44-IV project with R-2600 engine; mockup with XR-2800; not built
AP-4LP-44-2 WARRIOR proposal with 2000Hp R-2800-7; 200 ordered, also cancelled, and transfered to P-47B/C0
AP-5/A1938Single seat fighter project; appears in the Sarah Clark collection and US National Archives II0
AP-6/A1938Single seat fighter project; appears in the Sarah Clark collection and US National Archives II0
AP-7/A1938Speed record aircraft used by Major de Seversky to establish a new transcontinental speed record [NX1384]1
AP-8Fighter proposal; never completed; formed the basis for the AP-90
AP-91939Entrant in the 1939 Air Corps fighter competition, based on AP-8, used improved airfoil; lost to XP-39 [NX2598]1
AP-101939XP-47 THUNDERBOLT. Response to AC CP 39-770; light weight fighter to be powered by Allison V-1710 liquid cooled engine.0
?XP-47A THUNDERBOLT
?XP-47B THUNDERBOLT
?P-47B THUNDERBOLT (171 built)
?P-47C THUNDERBOLT (154 built)
AP-11
AP-12ROCKET. R-40C specification; highly streamlined design, engine behind the cockpit, driving tractor contraprop in nose via long shaft (competitor of XP-55)0
AP-131940
AP-14
AP-15
AP-16aP-47M THUNDERBOLT. / plain "AP-16" possibly allocated to XP-47B
AP-16b1944P-47N THUNDERBOLT
AP-17
AP-181941XP-69. Development of AP-12; intended powerplant Wright R-2160; ordered in July 1941; scale mock-up June 1942, cancelled 19430
AP-191944XP-72. Two built.
AP-20
AP-21a1946Seems to be related to North American's XT-28 (XT-28 Proposal for Rep. Model AP-21a); appears in the Sara Clark collection and US National Archives II
AP-22JB-2 THUNDERBUG (by Willys-Overland), a copy of the Fieseler Fi.103 "V-1" flying bomb (1000 built); became KUW-1, then LTV-2 "Loon" (LTV-A-1)
AP-231944XP-84 THUNDERJET. Includes initial designs. Three XP-84 aircraft ordered on 11 November 1944
AP-23FF-84C THUNDERJET variant.
AP-23X1947Preliminary design for a swept-wing F-84 (March 1947); not accepted by the Air Force Material Command0
AP-23M1949YF-96 (F-84F) THUNDERSTREAK. Final swept wing proposal; ordered as the YF-96 on the November 10, 1949
AP-23T1952YRF-84F THUNDERFLASH.
AP-241945YOA-15 SEABEE. Aircraft developed from RC-1, powered by one 215 hp Lycoming O-425-5 engine (and not with XO-425-7)
AP-25
AP-26
AP-27
AP-28
AP-29
AP-30engineering designation for F-84?
AP-311946XP-91 proposal for high performance research aircraft and day interceptor [MX-909]. Became the XF-91 THUNDERCEPTOR after redesign.2
AP-31-N11949F-91A THUNDERCEPTOR [MX-1658]0
AP-32
AP-33
AP-34
AP-35
AP-36engineering designation for F-84?
AP-37engineering designation for F-84?
AP-38Cargo and personnel land-based transport0
AP-39
AP-40
AP-41RAINBOW. The original proposal for the XF-12, drawing dated 15.10.47
AP-421945?Large USAF swept wing jet bomber proposal as follow-up to B-470
AP-43
AP-44A1948Mach 3 all-weather high altitude interceptor (led to AP-57)0
AP-45
AP-46XF-84H (initially XF-106) THUNDERSCREECH. Development of F-84F fitted with turboprop engine and first flown 22.7.55. No production.
AP-471948Mixed-power ground support airplane proposal0
NP-481948Proposal to the U.S.Navy against F3H, closely resembling the XP-91, with butterfly tail, wing with inverse taper but without wing tanks / rocket engines0
NP-491948Proposal to the U.S.Navy against F3H, same tail and wing arrangement as NP-48 but with two engines below the wing; nose partly glazed0
NP-501948US Navy bomber project similar in configuration to the Skywarrior, for USN's OS-115 VA class LRSA (Long Range Special Attack) proposal0
AP-51
NP-521950Twin-engine anti-submarine aircraft for OS-117 competition0
AP-53
AP-541949Single engine swept wing all-weather interceptor fighter study with F-91-style wing and large tip fittings0
AP-551950Twin-boom inverted V-tail lightweight fighter/interceptor project (F-91 derivative) against F-104. Several versions drawn, none built.0
AP-56
AP-571951XF-103 AWI Interceptor proposal and full development into Mach 3 (1954). 3 prototypes ordered, one started; cancelled Aug. 19570
AP-58
AP-59
AP-601949Four-engine turboprop aircraft – bomber variant of the Rainbow*; appears in Sara Clark0
AP-61(*could there be also a transport variant for the XC-Heavy Transport and Parasite/Missile carrier competition?)
AP-62
AP-631951F-105A/B THUNDERCHIEF. Swept wing fighter-bomber. Numerous layouts before final design was chosen
AP-63-5F-105C THUNDERCHIEF
AP-63-10Two-place all-weather variant
AP-63-191960proposal for British, French, German co-production; the British offered option of Olympus B.01.22R. Anderton states F-105D (July 1960)
AP-63-19E(?)proposal to Canada for strike attack Interceptor Day Fighter, limited all-weather F-105 with Orenda engine
AP-63-26proposal to Luftwaffe for F-105D version
AP 63-311957F-105D THUNDERCHIEF. All-weather version of F-105B, revised avionics/radar
AP-63-32proposal to Canada, an F-105 with advanced Iroquois engine
AP 63-331957-58F-105E THUNDERCHIEF. Two-seat, reduced fuel version of F-105D
AP-63-361958proposal for SR-196 Tactical Strike Reconnaissance System. Fuselage stretch may have been basis for F-105F (September 1958)
AP-64
AP-65
AP-66
AP-67
AP-68
AP-69
AP-70
AP-711954RF-105B THUNDERCHIEF. Reconnaissance version
AP-72
AP-73
AP-74
AP-751954Long range interceptor (LRI) project to WS-202A0
AP-761955research airplane project competing with North American X-15 (Project 1226 competition; MX-1554A; Preliminary Model Specification ES-348)0
AP-77
AP-78
AP-79
AP-80
AP-81
AP-82
AP-83
AP-84
AP-851955Two-seat swept-wing development of F-84F Thunderstreak0
AP-86
AP-87
AP-88
AP-89
AP-90UCX/UTX contender against the Lockheed JetStar and North American Sabreliner; was to have used a General Electric engine and a "bending" tailpipe.0
AP-91
AP-92
AP-93
AP-94
AP-95Air-to-Surface ballistic Missile (to fit in F-105 weapons bay)
AP-96Man-in-Space vehicle, proposed to Air Force
AP-97
AP-98
AP-99Strategic air-to-surface ballistic missile
AP-100/A1959Large V/STOL fighter-bomber proposal with three large lift fans mounted in centre of wide fuselage0
AP-106Parametric study for VTOL aircraft
Click to expand...
 
Many thanks,and I will display only my speculations with stricted
roles,but before I start,I have twice allocation to RC-2,first was a
developed version of RC-1 amphibian,and a passenger transport
project of XF-12.
 
hesham said:
Many thanks,and I will display only my speculations with stricted roles,but before I start,I have twice allocation to RC-2,first was a developed version of RC-1 amphibian,and a passenger transport project of XF-12.
Click to expand...
Indeed. I didn't cover the RC- designations specifically but it's true that RC-2 was allocated twice.
 
I will talk about my guessing to the designations;

AP 11,13,14,15,17,20,25,26,27,28,29,32,33,51,53,56,58,59,62,64,65,66,78,79,80,
81,82,86,87,88,89,91,92,93,94,98,101,102,103,104,105 &107

Of course I can expect after that,because the gaps are too
long to specify.
 
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hesham said:
I will talk about my guessing to the designations;

AP 11,13,14,15,17,20,25,26,27,28,29,32,33,51,53,56,58,59,62,64,65,66,78,79,80,
81,82,86,87,88,89,91,92,93,94,98,101,102,103,104,105 &107

Of course I can expect after that,because the gaps are too
long to specify.
Click to expand...

Here we go,and again it's only my Speculations;
 

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Hi,

I finish it,but again and again,it's only my speculations,means
that's my guess about missing designations,no confirm about
this list from the company or reliable sources,they are only a
real concepts,without any reference to their allocations.

Any additions,corrects or objections are welcome,I swear by
my God,I kept searching in many many sources to make it.

** If anyone upset from it,I can delete it,and only keep on the
file,which indicates to all of its componantes
 
hesham said:
my speculations,
Click to expand...
Speculations based on what?
I'm wary of any speculations on a designation system, not every design necessarily conforms to a system or be developed enough to warrant the application of a designation.
If you have some evidence to weigh up choices between a couple of numbers, fair enough - but 46 guesses seems more like randomly assigning numbers based on date. Anybody could come up with a different list on that basis.

Sometimes you just have to accept that there are gaps and inconsistencies in designation systems.
 
I delete it,and keep only the file about it,but we have many projects
and aircraft to the company without any designations,so the date is
the fundamental to determine them.

Can we search a way to get AP-88 ?.
 
hesham said:
Here we go,and again it's only my Speculations;
Click to expand...

From the Spangenberg,I add a rocket-1953 to my list,

Rocket-1953 was Air-to Surface rocket,could be not built
 

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hesham said:
There are many annual reports about Republic,may they have some unknown projects ?
Click to expand...
Very unlikely. Annual reports usually recapitulate publicly known programs and provide facts and figures about the company, mainly for the shareholders. They are not meant to shed light on a company's secret projects.
 
hesham said:
Here we go,and again it's only my Speculations;
Click to expand...

There are some unknown concepts,but it's too hard to
speculate or guess what were their designations;

- Lunar 1961
- Hypersonic project of 1963
- RC-4 transport project,1965
- Hypersonic project of 1965
- F-84F/V VTOL of 1965
- F-84 Twin engined project of 1960s
- F-84 Four engined project of 1960s
- FH-V1 1965
- FH-V2
- FH-V3
- FH-V4
- FH-V5
- FH-V6
- FH-S1
- FH-S2
- EWR-360 of 1966
- EWR-370 ?
- EWR A-400 & 401
- EWR-420
- V/STOL project of 1967
- FX of 1968
- in XFV-12 competition 1970
- High-Speed Helicopters 1974
 
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Hi,

AP-34 ? was unknown design,but may it was a single seat experimental interceptor fighter project,developed from F-91,had a dorsal intake,mid small wing and swept rear stablizer wing tail,to be powered by one turbo jet engine ?.
 
hesham said:
Hi,

AP-34 ? was unknown design,but may it was a single seat experimental interceptor fighter project,developed from F-91,had a dorsal intake,mid small wing and swept rear stablizer wing tail,to be powered by one turbo jet engine ?.
Click to expand...
Its unknown, but maybe had the following specific characteristics? What does this mean?
 
It's only my speculation about the designation,but the concept is really existed.
 
Please give one day to get it,I just found it suddenly in my files,when I searched about Republic company.
 
hesham said:
Here we go,and again it's only my Speculations;
Click to expand...

I re-set the list,as me and some members discovered a new projects,please it's
only my speculations about the designations,and there's no confirming on it,
except AP 77 & 88.
 

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Info in my files,there's no source mentioned,

Republic designed a V/STOL fighter-bomber aircraft project in 1954,and of course
it was without assign to its designation ?!.
 
hesham said:
... Republic designed a V/STOL fighter-bomber aircraft project in 1954...
Click to expand...

Not sure if this is helpful. Michel Wibault worked for Republic for almost a decade. In 1954, he was working on the Bristol Orion-powered Wibault Gyropter - a VTOL ground-attack aircraft concept. The problem is in finding out exactly when Wibault left Republic Aviation Corporation.

The previous year, Wibault had applied for a patent for his VTOL concept ... but the assignee for that patent wasn't Republic. It was the newly-formed Vibrane Corporation (with Wibault and Winthrop Rockefeller as shareholders)

Aircraft with enclosed rotor
-- https://patents.google.com/patent/US2807428A
 
Apophenia said:
Not sure if this is helpful. Michel Wibault worked for Republic for almost a decade. [...] Wibault had applied for a patent for his VTOL concept ... but the assignee for that patent wasn't Republic. It was the newly-formed Vibrane Corporation (with Wibault and Winthrop Rockefeller as shareholders)
Click to expand...

Haven't been able to determine the precise date, either. Here is what I found in the issue of Pionniers devoted to him:
In 1940 he was sent by General de Gaulle to the USA, leaving France on a cargo ship and participating in the organization of the so-called "Free France". However, his passion for aeronautics led him to collaborate with the Republic Corporation, resulting in the "Rainbow", a four-engined high performance transatlantic airplane with very advanced engineering. Unfortunately, the type failed to be marketed because of the aggressive maneuvers of a powerful competitor. Once released from his connections with the company, he created a research bureau whose main sponsor was the Rockefeller family. This led to his patent for orientable-jet exhaust that eventually led to vectored thrust jet engine technology through successive stages of evolution.
Click to expand...
Pionniers N° 39, 15 Janvier 1974, translated from the French.
 
Apophenia said:
Not sure if this is helpful. Michel Wibault worked for Republic for almost a decade. In 1954, he was working on the Bristol Orion-powered Wibault Gyropter - a VTOL ground-attack aircraft concept. The problem is in finding out exactly when Wibault left Republic Aviation Corporation.

The previous year, Wibault had applied for a patent for his VTOL concept ... but the assignee for that patent wasn't Republic. It was the newly-formed Vibrane Corporation (with Wibault and Winthrop Rockefeller as shareholders)

Aircraft with enclosed rotor
-- https://patents.google.com/patent/US2807428A
Click to expand...

Thank you my dear Apophenia,

and I know this Info,and I have a report about all of his working,but that
project was designed by Alexander Kartveli as I think.
 
hesham said:
- Lunar 1961
- Hypersonic project of 1963
- RC-4 transport project,1965
- Hypersonic project of 1965
- F-84F/V VTOL of 1965
- F-84 Twin engined project of 1960s
- F-84 Four engined project of 1960s
- FH-V1 1965
- FH-V2
- FH-V3
- FH-V4
- FH-V5
- FH-V6
- FH-S1
- FH-S2
- EWR-360 of 1966
- EWR-370 ?
- EWR A-400 & 401
- EWR-420
- V/STOL project of 1967
- FX of 1968
- in XFV-12 competition 1970
- High-Speed Helicopters 1974
Click to expand...

I forget this competitio of 1964,

 

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