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Bölkow and MBB designations

hesham

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I will explain the Bolkow aircraft from 1948-1968 and MBB only from
1968-1991. the explaination is not regular.


MBB Phnix,L-252 Phoebus sailplanes.
RJP-1005 groung attack rotor jet project.
FK.6 light aircraft.
 

hesham

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Bo-46 two seat all metal research helicopter.
Bo-87 research helicopter developed from Bo-46.
Bo-102 Heli -Trainer: single seat light helicopter.
Bo-103 a flying version of Bo-102 with open cockpit.
Bo-104 proposed 2-seat light helicopter with two 120 h.p. NSU-Wankel rotary engines.
Bo-105 light helicopter with 4/5 seat.
Bo-106: Bo-105 with wider main cabin module and two additional (total 7) seats.
Bo-107 Medium transport helicopter led to MBB-Kawasaki BK-117.
Bo-108 developed from Bo-105 as 7-seat helicopter with redesigned streamlined nose.
BN-109 project 4-seat helicopter consider scaled-down Bo-105,developed with Nurtanio.
Bo-110 ----?.
Bo-111 ----?.
 

hesham

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Bo-112 ----?.
Bo-113 ----?.
Bo-114 ----?.
Bo-115 attack helicopter to compete Westland-VFW P-277.
Bo-116 ----?.
BK-117 MBB & Kawasaki co-operation to produce medium transport helicopter with
11-seat capacity.
Bo-118 ----?.
Bo-119 ----?.
Bo-120 developed in 1969 for the BMVg high speed helicopter program,
it based on the existing Bo-46.
Bo-130 ----?.
 

boxkite

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A few additions:

Bo 70 – helicopter project (no details; only two references: FLUG REVUE May 1965 on page 18, and “Typenhandbuch der deutschen Luftfahrttechnik” by Lange on page 247)
Bo 125 – proposal for an European transport helicopter of the third generation (1981)
Bo 140 – tiltwing project in civil (Bo 140Z) and military (Bo 140M) configuration (see http://www.secretprojects.co.uk/forum/index.php?topic=271.0)
Bo 205 – two-/three-seat light aircraft project (1962), developed to the LFU (=Leichtflugtechnik-Union) LFU 205 V3
Bo(?) 207 – the same source (“Ludwig Bölkow und sein Werk – Ottobrunner Innovationen” by Gersdorff) uses consequently the designation Bölkow 207 (without Bo), four-seater was founded on the Klemm Kl 107 C, first flight on 10 Oct 1960
Bo 208 “Junior” – license production of the Swedish MFI 9
Bo 209 “Monsun” – serial production (100 aircraft were built, plus a single aircraft in 1973/74) of the amateur aircraft MHK 101 V2
Bo 210 – other designation for the projected MHK 102 V1

Btw, designation system of (the most) German aircraft manufacturers don’t use hyphens, so the correct spelling is Bo … (not Bo-...)
 

hesham

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Thanks boxkite,

B0-211 Taifun : light aircraft.
B0-212 ----?.
B0-213 ----?.
B0-214 developed from B0-207.
B0-310 Tip Jet transport project of 1963.
HFB-320 Hansa Jet :all metal,twin engine 10-seat business-jet aircraft.
HFB-330 Hansa Fan Jet: developed from Hansa Jet with turbofan engines.
 

hesham

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T-17 tilt-wing military transport aircraft.
BBH-1 (small wing) armed escort helicopter.
BBH-2 (large wing) same as above but with a fan-in-fin tail rotor,and pusher propeller
on the tail.
Hunter tip jet attack aircraft.
Horus ----?.
C-160 Transall : cargo tactical transport aircraft for NATO.
C-161 Transall : project developed from C-160.
MBB-223 Flamingo : after absorb SIAT produced that light aircraft.
T.1 Flamingo :a trainer version.
 

boxkite

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Bo 70 - now I remember it was the project of a heavy crane helicopter with low-pressure tip-driven rotor. I believe a test-rig for the rotor was built.

?Bo? 310 - I would say Bölkow P 310 is the correct designation. Hesham, please note that Bölkow sometimes used the same number once again, but for different layouts. An example is the 209 - the Bo 209 is a total different aircraft than the P 209 project! So I only read about the P 310. I've never seen the type designation Bo 310. Be careful with the equation of Bo and P.

Further information (drawings, artwork, etc.) on

- T-17 tilt-wing military transport aircraft
- Hunter tip jet attack aircraft

is very welcome, Hesham.
 

hesham

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Dear boxkite,

the Bolkow B0-310, Hunter and T-17 mention in (www.aiaa.org) site.
 

hesham

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Hi;

Sager and Horus were a space aircraft
B0-214 was a B0-207 but with tricycle under carriage instead of tailwheel

I will complete:-

Me-200 and Me-400 was an attempt to built CASA C-101 trainer aircraft in germany
under licence
Me-2010,Me-2020,Me-2030,Me-2040 and Me-2050 were a rotor het transport projects
P 109 fighter/intercopter project
P 110 tailsitter high-altitude supersonic fighter/intercopter
P 209 ----?
Tip Jet 1,2 and 3 three defferent design to tip jet aircraft
F-90 advace fighter to EFA program
 

hesham

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if anyone know some P projects to Bolkow or MBB companies please tell us.
 

boxkite

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Dear boxkite,

the Bolkow B0-310, Hunter and T-17 mention in (www.aiaa.org) site.
Yes, I know, hesham, because I'm one of the authors of this site ;). I hoped to get further information and pictures of better quality (the T-17 scan came from a Xerox copy :( ).
 

hesham

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Dear boxkite,

the Bolkow T-17 is mention in the site I told you before and I get it only from internet.
the site is www.aiaa.org
 

boxkite

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Hesham, are you sure with the MBB (or Bölkow) Hunter? I assume a mistake of translation, because a 'Entwurf eines Hubschrauberjägers' (= 'design of a helicopter hunter') with two flapping rotors (is this the correct English term?) is shown in "Hubschrauber and Tragschrauber" by Gersdorff and Knobling. Unfortunately, the authors don't give a project number.
 

hesham

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Hi boxkite,

you will find it in www.aiaa.org/tc/vstol/unbuilt/index.htm
 

boxkite

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Yes, I remember. Arne made the mistake to translate the caption to create a "Hunter". It's definitely wrong - I'll contact him for correction. Hope some day we'll get the real project number. Sorry for confusing. Please delete the 'designation' "Hunter" from your MBB/Bölkow list.
 

Antonio

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This the Hunter ;)
 

hesham

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Hi boxkite,

please tell us about MBB and Bolkow projects,such as P.209.
 

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From Aviation Week1965, a photo of a model of the Bo 70. Why was
here a tailrotor incorporated in a design with a tip driven rotor ?
 

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Jemiba said:
From Aviation Week1965, a photo of a model of the Bo 70. Why was
here a tailrotor incorporated in a design with a tip driven rotor ?
How else would you yaw the fuselage??? If you're pointed north, but you want to be pointed east or west, how else do you accomplish it?
 

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How is it accomplished by other tip driven rotor helis ? I know, that
the rotor downwash aound the tail surfaces, or with the S.1221 Djinn
the turbine exhaust was used, or a bleed air puffer, even on large
designs. Is the Bo 70 too large for this method ?
A tail rotor would have added complexity ... ???
 

hesham

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For Bolkow;

P-250 was a surface-to-air missile led to developed the Nord/MBB
Roland missile.
 

hesham

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Hi,

Bolkow Bo.625 was Azur Satellite;

http://www.daviddarling.info/encyclopedia/A/Azur.html
http://www.flightglobal.com/pdfarchive/view/1969/1969%20-%201917.html
 

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Hi Boys:
I can add that the X-31A (Snake), joint program between North American and MBB, was the P.20.
Moreover, could be useful to remember that
Bo 108 was the basis for Eurocopter EC-135
P.120L was developed as the Eurocopter EC-120 Ibis (later Colibri), but I don't know if P.120 was a designation of MBB or Aerospatiale origin
BK-117C-2 became Eurocopter EC-145
Bo 115 was the starting point of the development of Eurocopter EC-665 Tiger
Bo 125 was developed as the NH Industries NH-90

Nico
 

Stargazer2006

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Nico said:
Hi Boys:
I can add that the X-31A (Snake), joint program between North American and MBB, was the P.20.
Moreover, could be useful to remember that
Bo 108 was the basis for Eurocopter EC-135
P.120L was developed as the Eurocopter EC-120 Ibis (later Colibri), but I don't know if P.120 was a designation of MBB or Aerospatiale origin
BK-117C-2 became Eurocopter EC-145
Bo 115 was the starting point of the development of Eurocopter EC-665 Tiger
Bo 125 was developed as the NH Industries NH-90

Nico
Interesting, thanks. I believe that the "120" designation (as all the 100+ Eurocopter designations) come straight from Bölkow (EC117, EC135, etc.). The Aérospatiale ones are in the 300+ series and are a continuation of the Sud-Aviation system. (e.g. SA-330 > AS330 > EC332)
 

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A little bit of info on the BN.109 proposed as a joint-venture with Nurtanio.

It was to be a four-seat scaled-down Bo-105 powered by a single Porsche piston engine.

Also there is the BK-117 series of designations;
BK-117 A-1: Production type with 550shp LTS-101-650B-1 engines
BK-117 A-3: 7055lb TOGW, new stability system and enlarged and redesigned tail rotor
BK-117 A-3M: Proposed military variant of A-3 with raised skids, chin turret and stub wings for eight HOT ATGW and roof-mounted sight
BK-117 A-4: Increased fuel capacity, improved transmission and new automatic flight control system
BK-117 B-1: Two 592shp LTS-101-750B-1 engines and 7055lb TOGW
BK-117 C-1: Two Turbomeca Arriel 1E turboshafts
 

hesham

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Nico said:
Hi Boys:
I can add that the X-31A (Snake), joint program between North American and MBB, was the P.20.
Moreover, could be useful to remember that
Bo 108 was the basis for Eurocopter EC-135
P.120L was developed as the Eurocopter EC-120 Ibis (later Colibri), but I don't know if P.120 was a designation of MBB or Aerospatiale origin
BK-117C-2 became Eurocopter EC-145
Bo 115 was the starting point of the development of Eurocopter EC-665 Tiger
Bo 125 was developed as the NH Industries NH-90

Nico
Thank you Nico,

and for Bo.125,please see;

http://www.secretprojects.co.uk/forum/index.php/topic,3181.msg25642.html#msg25642
 

Nico

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Hi fellows,
I enclose two artist's impressions of BK 117 dating back to about 1978. As you know, in 1974-1975 there was a start in negotiation that lead to an agreement signed on 25 February 1977 between MBB and Kawasaki to develop jointly an eight/ten-seat multi-purpose helicopter, known as the BK 117. This new project superseded two earlier separate projects known as the Bo 107 and the KH-7.


Nico
 

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Nico

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Hi boys,
I'm continuing my posts on the saga of MBB helicopters.
I found this artist's impression so officially captioned:
ALH: Advanced Light Helicopter in the 4-ton class, joint programme of MBB and Hindustan Aeronautics Ltd. India.
The project is obiouvsly the basis of the present days Dhruv and dates back to 1984. Any chance to know the real project designation (German and/or Indian) other than the acronym ALH? Perhaps something in the Bo.110 range?
Nico
 

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Apophenia

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Thanks Nico and good question on ALH -- I haven't been able to find any alpha-numeric designation.

HAL seems to have abandoned its Hx- series of designations in favour of generic role acronyms -- in this case: Advanced Light Helicopter (ALH Dhruv), Light Combat Helicopter (LCH), and the unbuilt Light Observation Helicopter (LOH) project.

It seems probable that MBB would have assigned a project designation (at least for internal use) but perhaps that "Bo.110 range" is too early? The BK 117 dates from a 1977 MBB-Kawasaki agreement. Likewise, the Bo 125 project dates from 1980-81. So, if MBB didn't begin work on HAL's ALH until around February 1984, could Dhruv have started off as 'Bo-130'?

For the record, my MBB Bo designation lists follow. I'm not sure if I've filled any gaps ... there certainly are plenty left!
 

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Bölkow/Messerschmitt-Bölkow-Blohm (MBB) Rotary-Wing Designations


Bo X - tip jet flying crane (ringed fenestron TR), start late '50s, end early '60s
-- Bo-X: heavy-lift helicopter to USA spec (20t payload, actually 26.5t for Bo-X.
-- Same as Bo 70 project [?]

Bo FJ - 1960 Flying Jeep, multi-rotor platform (intended to be scalable)
-- Bo FJ: 110 hp diesel-powered compressor provided compressed air to rotors
--- rotor drive system devised by Dr Heidelberg (as per BO X/Bo 70)

Bo 46 -- 2-seat research helicopter to flight-test Derschmidt rotor system, 3 prototypes
- Early concept: tandem seat, tip jets, under-fuselage engine, tail rotor louvers
- 1 x 597 kW (800 hp) Turboméca Turmo IIIB or 2 x Turboméca Marboré turboshafts

Bo 70 - [Project] heavy-lift helicopter with Heidelberg rotor system
-- Same as Bo X project [?]

Bo 87 - [Project] prob. Bo P 87, research helicopter developed from Bo-46
- Bo 87/2 (Bo 46) - Jan 1959, 1 x 1,014 hp (756 kW) T58, V-tail with twin pusher props

Bo 102 - Heli-Trainer: non-flying single-seat helicopter trainer
- Bo 102 Heli-Trainer: 1 x 1 x 40 hp ILO or 1 x 30 kW Hirth piston engine

Bo 103 - 1959, flying version of single-seat Bo 102, 1 x Agusta GA V 4-cyl

Bo 104 - [Project] 2-seat light helicopter, rigid rotor, 2 x 120 hp NSU-Wankel rotaries
-- http://www.secretprojects.co.uk/forum/index.php/topic,2800

Bo 105 - 4/5 seat light helicopter [see separate listing of Bo 105 variants]

Bo 106 - 1973, Bo 105 with wider, 7-seat main cabin, Allison 250-C20B, 1 built

Bo 107 - Medium transport helicopter led to MBB-Kawasaki BK-117

Bo 108 - development of Bo 105 with one-piece hingeless/bearingless blades, 2 prototypes
- Bo 108 VT2 served as a testbed for the very similar Eurocopter EC 135

BN-109 - [Project] 1985-86 MBB/IPTN Nurtanio-developed scaled-down 4-seat Bo-105
- BN-109: 1200 kg MTOW, 680 kg empty, 550-600 km range, 200 km/h cruising speed
-- NB: As with NBo-/NBO-105, Indonesian sources do use a hyphen in designations

Bo 110 - [?]
Bo 111 - [?]
Bo 112 - [?]
Bo 113 - [?]
Bo 114 - [?]

Bo 115 - [Project] Bo 105-derived attack helicopter to compete Westland-VFW P-277
Bo 116 - [?]
BK 117 - MBB/Kawasaki co-production of Bo 107/KH-7 projects, 11-seat capacity
- BK 117A-1: Production type with 550shp LTS-101-650B-1 engines
- BK 117A-3: 7055lb TOGW, new stability system and enlarged and redesigned tail rotor
- BK 117A-3M: [Project] military 'A-3, high skids, roof sight, chin turret, 8 x HOT ATGW
- BK 117A-4: increased fuel capacity, uprated transmission, new automatic flight control system
- BK 117B-1: 2 x 592 shp LTS-101-750B-1 turboshafts, 7055 lb TOGW
- BK 117C-1: 2 x 770 shp Turbomeca Arriel 1E turboshafts
- BK 117C-2: aka Eurocopter EC 145, extended cab (compared to 'C-1)
-- UH-145: marketing desig. for military EC145 (aka UH-72A Lakota)
-- H-72A/UH-72A Lakota: US mil designations for 'C2/EC145
- BK 117D-1: [??] prob. doesn't exist ('D2 springing directly from 'C2?)
- BK 117D-2: aka Eurocopter EC 145 T2, EC 145/BK 117-C2 with Arriel 2+ and fenestron
-- EC 645: military 'C2, aka Armed Scout 645 (see UH-145/UH-72A above)

Bo 118 - [?]
Bo 119 - [?] helicopter

Bo 120 - 1969 study/proof-of-concept for BMVg High Speed Helicopter Program
- Bo 120 X2: PoC (Bo 46 conv.) 2 x Allison 250-C20 + RB 108 lift/propulsion jet
- Bo 120: [Project] UH-1D Nachfolger study, 6-blade MR, fenestron TR, stub wings

Bo 125 - [Project] 1980-81, medium transport (deriv. from Bo 107), 18/20 pax
- Bo 125B: military medium transport with rear loading ramp
-- aka Transporthubschrauber TH 3, dev. as a Bundeswehr UH-1D replacement
-- http://www.secretprojects.co.uk/forum/index.php?topic=3181.0

Bo-130 - [?]

Bo 140 - [Project] V/STOL tilt-wing transport, 4 x 11,400shp GE1-S1-1T turboshafts
- Bo 140M: military transport variant, rear loading ramp
- Bo 140Z: civil airliner variant, 80-100 pax (no rear ramp)
_____________________________________________________________
 

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Messerschmitt-Bölkow-Blohm Bo 105 Sub-Type Designations [CDN inserted before sub-type designation for MBB Canada-built a/c]

Bo 105 - 4/5 seat light helicopter, twin-engined with rigid main rotor
- Bo 105 V1: 1966, Westland Scout rotor, unflown (destroyed by ground resonance)
- Bo 105 V2: 1967, Bölkow rigid rotor, 2 x Allison 250-C18 turboshafts
- Bo 105 S1 - SB, 1969 pre-production series, 2 x Allison 250 C18
-- aka Bo 105 V4 and V5
- Bo 105A: First production lot, Allison 250 C18, 1970
- Bo 105B: 1967, aka Bo 105 V3, 2 x 280 shp MAN 6022B turboshafts
- Bo 105C: 1971 production model, 2 x Allison 250 C20 turboshafts
--- NBO-105: Indonesian IPTN licenced Bo 105C (rotors/trans supplied by MBB)
-- Bo 105CB: 1976, utility model, Allison 250 C20B, 1976
--- NBO-105 CB: Indonesian equivilent to Bo 105CB, Allison 250 C20B
--- Bo 105CB-4: [used by Chilean AF, others?]
--- HKP-9A: Swedish army Bo 105CB PAH (Saab Emerson HELI-TOW PAL)
-- Bo 105CBS: 1980 Super Five, stretched utility/EMS variant, 250 C20B
--- NBO-105 CBS: Indonesian equivilent to Bo 105 CBS, Allison 250 C20B
--- NBO-105S: IPTN's stretched version of NBO-105 CBS
--- PT.DI Bumblebee-001: [Project] Indonesian attack helicopter based on NBO-105
---- http://www.secretprojects.co.uk/forum/index.php/topic,11639
-- Bo-105CBS-4: Spanish CASA-built 'CBS for Guardia Civil
-- Bo 105CBS-5: Super Five, 1994 high-performance Bo 105CBS variant
--- aka Eurocopter EC-Super Five, 250 C20B, new rotor blades, uprated gearbox
-- Bo 105CS, 1977 Bo 105C SAR variant, Allison 250 C20
--- HKP-9B: Bo 105CBS SAR variant for Swedish AF
- Bo 105D: 1972 offshore version of Bo 105CB, 250 C20B, for UK FR operation
-- Bo 105DB: minor mods for UK certification
-- Bo 105DB-4: [?]
-- Bo 105DBS: stretched EMS version of UK-certified Bo 105D
--- Bo 105DBS-4 and Bo 105DBS-5
-- Bo 105DS: [?]
- Bo 105E-?: [Export?] re-desig. of ex-Bundeswehr Bo 105P for donation [?]
-- Bo 105E-4: 2006 upgraded ex-Bundeswehr Bo 105P donated to Albania
- Bo-105 Executaire: stretched Bo 105C under licence by Boeing Vertol and Carson
- [??] Boeing torpedo-armed Bo-105 proposal for US Navy LAMPS II competition
-- http://www.secretprojects.co.uk/forum/index.php/topic,13139.msg130333.html#msg130333
- Bo 105HGH: 'high-speed helicopter' from V2 prototype, streamlined, then fitted with wings
- Bo 105L, Allison 250 C28C, Bo 105CB with more powerful engine/uprated gearbox
-- Bo 105LS: more powerful (2 x 550 shp/uprated gearbox) version
-- Bo 105LS: Bo 105CBS with more powerful Allison 250 C28C engine
-- Bo 105LS-A1: 1984, stretched, Allison 250-C28C, 1 a/c for Chilean AF
-- Bo 105LS-A2: [Project]
-- Bo 105LS-A3: 1986, hot-and-high Bo-105LS, 2600 kg MTOW, first 10 [?] 'LS-A3 by MBB, remainder by MBB Canada
--- Bo 105LS-A3 offered to Canadian Coast Guard (which took Bo 105 CDN-BS-4s instead)
-- Bo 105LS-B1: Bo-105LS prototype re-engined with twin P&WC PW2OSB turboshafts (intended for CFLH requirement)
--- Bo 105LS-B1: 1988, one a/c built and tested in Canada (C-FMCL)
-- Bo 105LS-AR: Super Lifter, 1995, Allison 250 C28C, new MR blades (conv. of existing 'LS)
- Bo 105M, Allison 250 C20B, 1978, VBH for Bundeswehr Heeresflieger
--- VBH = Verbindungs und Beobachtungs Hubschrauber ('connection' or scout)
-- aka HE.15 (Helicóptero Escuela) Spanish military training helicopter
--- Bo-105GSH: Spanish light anti-tank helicopter, equivalent to Bo 105M/VBH
--- aka Bo 105LOH/HR.15 (Helicóptero de Reconocimiento), 14 for Spanish Army
--- HR.15, opt. twin 7.62mm machinegun armament (but likely never fitted)
-- Bo 105[?]: [Project] BSH 1 (Begleitschuetz Hubschrauber) escort helicopter
--- BSH 1: 54 Bo-105M/VBH selected for conv. with Stinger AAM, cancelled 1993
-- Bo 105MSS: Maritime Surface Search, Bo 105M fitted with search radar
- Bo 105P, Allison 250 C20B, 1979, anti-tank a/c for Bundeswehr Heeresflieger
-- aka PAH 1 (Panzerabwehrhubschrauber), BW designation, 6 x HOT ATGM tubes
-- Bo 105ATH: Spanish equivalent to Bo 105P/PAH-1 light anti-tank helicopter
--- aka HA.15 (Helicóptero Asalto), 28 for Spanish Army, 6 x HOT missiles
-- Bo 105P1: 1991 PAH 1 upgrade (x 155 with HOT 2), aka PAH 1A1/PAH 1 Phase 1
-- Bo 105P2: [Project] PAH 1A2/PAH 1 Phase 2 night attack version, canc. Jan 1993
-- Bo 105/OPHELIA: 1981 test and trials a/c fitted with mast-mounted sight
--- aka 'Giraffe', OPHELIA = Optique Platform HELIcoptere Allemande
- Bo-105SC: 10 x Philippine-assembled Bo 105C for PADC [? confirm desig. ?]
 

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Bölkow Fixed-Wing Aircraft Bo 2xx Designations

Bo 205 - 1968 2/3-seat experimental GRP light aircraft, 1 prototype built
- Bo 205: original Bölkow desig. for Flugzeug Union Süd (FSU) LFU 205*
-- * LFU = Leichtflugtechnik-Union, a Bölkow/RFB/Pützer consortium

Bo 206 - [??] some online misidentification of Bo 105C

Bo 207 - 1960 4-seat light a/c, wood const., 1 x 180 hp Lycoming IO-360-A1A
- Kl 107D: 1960 4-seat dev. of Bölkow-built 3-seat Klemm Kl 107B, 2 prototypes
- F 207: May 1961 Bölkow re-desig. of Kl 107D, re-desig. Bo 207 July 1961
- Bo 207: Bölkow series production version, 90 built
- Bo 207B: Bo 207 with tricyle landing gear, aka Bo 214, 1 temporary conv.
- Bo 207T: Kl 107D/F 207 V1 mod, as reduced weight trainer, 1 conv.

Bo 208 - 1966 'Junior', licence-produced Malmö Flygindustri MFI-9

Bo 209 - 1971 'Monsun', 2-seat glider tug/trainer, 101 Bo 209 built
- MHK 101: 1967 POC prototype by Bölkow tech. director/staff, 1 built
--- MHK = Dr. Hermann Mylius, Walter Heynen, and Johannes Krauss
- Bo 209-150: 150 hp Avco Lycoming O-320-E1C, McCauley propeller
- Bo 209-160: 160 hp Avco Lycoming IO-320-DIA, Hartzell propeller
- Bo 209S (Schule): two-seat trainer, fixed wings and undercarriage*
-- * Other Bo 209 models had folding wings and a retractable nose gear

Bo 210 - [Project] Bölkow desig. for MHK 102 V1, 1 x Avco Lycoming O-320
-- leads to 1-seat Mylius My-102 Tornado, 2-seat My-103 Mistral, 4-seat My-104 Passat
-- NB: duplicate number appears in Bölkow-SIAT BS 210 STOL transport project

Bo 211 - [Project] aka MBB 211, planned Bo 209 successor
-- aka 'Taifun' light aircraft [confirm?]
- 'Ludwig Bölkow und sein Werk - Ottobrunner Innovationen', Kyrill von Gersdorff, Bernard & Graefe Verlag, Bonn

Bo 212 - [??] (poss. conf. with self-sealing tank designations)
Bo 213 - [??] (poss. conf. with self-sealing tank designations)

Bo 214 - aka Bo 207B, temporary tricycle u/c conv. of one Bo 207
 

Stargazer2006

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Awesome, Apophenia, thanks!

I have a problem with Nico's picture at the top of this page: it is labeled as the LCH but the text describes it as the ALH... which of the two does it actually depict??
 

Nico

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you are quite right. Unfortunately I failed in my search of a release date for those artist's impressions but I can say that the three-view drawing of the Bo 125B is contemporary (or, at least, contained in the same press kit) of the two with the Aerospatiale and MBB logo depicting the PAH 2 (no longer named the Bo 115).
I agree also that the EC-665 is a completely different helicopter from the Bo 115 and early PAH 2, as well as the Bo 125B is only a project in the same class of the NH-90 that, in practice, was a totally new development.
But, from a designation point of view, those Boelkow projects are the starting point of today Tiger and NH-90 (or, as I like to name it, Caiman) in the same way, for example, that saw the evolution from early four turboprop Model 464 to the eight-jet iteration (still named the 464 but with different block number) to do the B-52 we know
Nico
 

Nico

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Stargazer2006 said:
Awesome, Apophenia, thanks!

I have a problem with Nico's picture at the top of this page: it is labeled as the LCH but the text describes it as the ALH... which of the two does it actually depict??

Sorry Stargazer,
I failed to signal my fault in naming the .jpg: the helicopter is obviously the ALH (now Dhruv): the LCH was the light attack derivative
Nico
 

Bill Walker

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Just found this interesting thread. I can offer a little clarification on some of the sub variants.

The 105 D series (including DB and DBS) had minor modifications required for UK certification.

The Bo 105LS was offered to the Canadian Coast Guard, but none were sold to them. The Canadian Coast Guard and at least one Canadian commercial customer received the Bo 105 CDN-BS series, with minor modification for Canadian certification - mostly cold weather related.

The BO105L, LS A-1 and the first ten or so LS A-3 were built in Germany. The remainder of the LS A-3 were assembled in Canada with a mixture of German and Canadian made components. The LS A-2 was a paper project only. The LS Superlifters were all converted in Germany from existing LS airframes.

The LS B-1 was converted in Canada from a mix of C and L series airframes, plus some new components. It was intended to meet the Canadian Forces CFLH requirement, for an armed scout helicopter for use in Europe. By the time it flew the CF requirement had grown to the point where a highly modified BK117 was being offered. Canadian government spending cuts killed the CFLH program, and the B-1 was flown for about 50 hours to prove the PW120 engine for use in the Bo 108 - which became the EC135.
 

Bill Walker

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Some more clarification on the Bo 105 terminology, this is all coming back to me as I think about it.

The "L" stood for Lift, the "S" stood for "stretch". All the L and LS used BK117 style wider chord tail rotor blades, plus BK117 tail rotor hub, gearboxes and drive shafts. The Superlifter (both CBS and LS) used new main rotor blades with slight taper on the outboard portion. I don't think this style of blade was ever used on the BK series.
 

Apophenia

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Many thanks for the clarifications Bill. BTW, are you this Bill? http://www.ody.ca/~bwalker/author.html
 
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