Bell Airacobra Mk.I: The Airacobra Meets the British

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Bell Airacobra Mk.I

Hello! and welcome to my suggestion for the Bell Airacobra in British Service (Known as the P-39 in US service). This, similarly to my other recent suggestions, will be a two part series where I cover the Airacobras in UK service, today I will focus on the first Airacobras the RAF Bought, the Airacobra Mk.I, also known as the P-39C.

History

Spoiler

In 1940 the British Direct Purchase Commision based in the US was looking for new Combat aircraft to compliment other American built aircraft such as the Tomahawks making their way into RAF service, to this avail the P-39 Airacobra was chosen as a prime candidate, the RAF initially ordered 675 aircraft built to slightly different specifications, however due to the desperation of the RAF to get new aircraft into service, 3 P-39C variants were supplied in order to speed up the testing at Boscombe down.

Two of these aircraft reached the UK by July 1941, being given the serials DS173 and DS174, these were standard P-39Cs with no modifications meaning unlike their later british cousins they retained the 37mm Cannon firing through the Prop hub, These were to be dubbed the Caribou Mk.I However were later renamed to the Airacobra Mk.I for simplicity. These were to be used for Gunnery Trials However these were limited due to the lack of spare parts and the excessive amount of time it took to rearm or replace the Cannon (taking at least 20 mins to rearm it and over 24 hours to fully replace it).

This was not the end of the troubles these Airacobras faced however, in November 1941 DS173 was heavily damaged following an undercarriage failure after landing and only 4 weeks later DS174 suffered an engine failure, these incidents rather humorously convinced the Pilot, who was the same in both incidents to retrain as a Technical officer instead. Despite these issues the RAF went ahead with their procurement of the rest of the order with the Airacobras after being dubbed the Caribou Mk.IA, and like their counterparts were later renamed to the Airacobra Shortly after their arrival.

Not much is known of the Third Airacobra Mk.I, No Documentation seems to exist of it and it is not recorded as being tested at Boscombe down, so it is most likely safe to assume it was lost in transit across the Atlantic, most likely due to German U-boats.

Images

Spoiler

image

An Airacobra Mk.I at Boscombe Down, note that it only has one 7.62 in the wings

image

The Two Airacobra Mk.Is beside each other

image

An Airacobra Mk.I taking off from Boscombe Down

Specs/Armament

Spoiler

General Characteristics/Performance

Crew: 1
Engine: Allison V-1710-35
Take-off weight: 4000 kg
Max altitude: 9 500 m
Max speed: 576 km/h
Length: 9.19 m (30.2 ft)
Span: 10.36 m (34.0 ft)
Height: 3.61 m (11.8 ft)

Armament

  • Guns
    • 1 x 37mm Cannon

    • 2 x 12.7mm Machine guns

    • 2 x 7.62mm Machine guns

**More info greatly appreciated **

Place in game

Spoiler

In game I feel this would fit best as a Premium due to it only being tested by the RAF however it would be an interesting aircraft to add, offering a different and Unique playstyle to the game that not many British aircraft offer, In terms of BR it would most likely fit best at 2.3 due to it being superior to the P-400 but still worse than the P-39N in the US tree

Sources

Spoiler

Bell P-39 Airacobra - Wikipedia
P-400 - War Thunder Wiki
P-39 Performance Tests
http://www.wwiiaircraftperformance.org/P-39/P-39C_40-2988.pdf
THE SECRET YEARS flight testing at boscombe down 1939 - 1945, Tim Mason, ISBN 0951989995

4 Likes

+1 would be good to see this test mark as a Premium and the Mk IA as TT.

1 Like

+1

1 Like

Gib
The best aircraft that the RAF used were american made, and they should all be featured in the Tech Tree

2 Likes

A +1 from me, would make for a nice premium

1 Like

@lxtav I couldn’t find a part two so I assume this is just regarding the P-39C in RAF service? I can help with information and clear things up as I’ve been researching the Airacobra in RAF service.

Im currently working on a Mk.IA suggestion, just had some pwrsonal stuff over the last few months

+1

…ya just that +1.

1 Like

Any status on it?

+1 for RAF Airacobra.

According to the USAF/USAAF Serial Number database, it said DS175 was struck off charge before scrapping on Jan 7, 1944. Otherwise, I believe they would have noted it as “lost” if it had been sunk by German U-Boats.

I don’t think that’s Mk.I/P-39C, but that is the Mk.IA/P-400, which had wing guns and 12 stub exhausts. You can differentiate between P-39C and P-400 by looking at the number of stub exhausts. It’s six stubs on each side for the P-39C, and it’s 12 stubs on each side for the P-400.

You stated:

Standard P-39Cs have all MGs located in the nose and six stubs as illustrated below.

I think this topic needs some serious clarification/amendment as it has multiple errors and appears to be regarding one aircraft variant (Bell Model 13) yet swings between two (Bell Model 13 and 14). I have never seen “Airacobra Mk.IA” used officially and Phil Listemann states it would have been used for P-39D-1s if received under Lend-Lease. The Bell Model 14 was known in US service as the P-400 and in RAF service as the Airacobra Mk.I or the Airacobra (British Version) at A&AEE.
Sources [1], [2] and [5]

The Bell Model 13 was known in US service as the P-39C and in RAF service as the Airacobra Mk.I or the Airacobra (American Version) at A&AEE. Three were sent to the UK under Lend-Lease, primarily for firing trials with the 37mm cannon:
DS173 - ex 40-2981
DS174 - ex 40-2983
DS175 - ex 40-2984
They arrived in early July 1941 and were assembled at RAF Colerne by No. 4 Aircraft Assembly Unit.
Sources [1], [2], [3], [4] and [5]

DS173
This aircraft first flew on 6 July 1941 before being delivered to the Aeroplane and Armament Experimental Establishment (A&AEE) at RAF Boscombe Down for trials. It was also sent to No. 601 Squadron at RAF Duxford where it conducted Air Tests and Performance Tests in November 1941, being returned to RAF Boscombe Down the same month.
Sources [1] and [5]

DS174
This aircraft was delivered to the Air Fighting Development Unit (AFDU) at RAF Duxford on 15 July 1941 for tactical trials. It was also sent to No. 601 Squadron at RAF Duxford where it conducted Air Tests and Air Firing in November 1941, being returned to RAF Boscombe Down in December 1941. DS174 was Category E (Written Off) on 28 October 1942.
Sources [1] and [5]

DS175
This aircraft is noted as being held in reserve and was Category E (Written Off) on 7 June 1942 and/or Struck Off Charge on 7 January 1944.
Sources [1], [4] and [6]

The Images section of this suggestion only contains photos of Model 14 aircraft. I know of two photos of Model 13s in RAF service, the header contains one yet is missing a caption:


“Airacobra Mark I, DS173, one of three ex-USAAC P-39Cs supplied under Lend-Lease for firing trials with the 37mm cannon mounted in these examples, seen here at Colerne, Wiltshire, after erection by No. 4 Aircraft Assembly Unit. Following the trials at the Aeroplane and Armament Experimental Establishment, DS173 served with No. 601 Squadron RAF.” - IWM


“P-39C DS173 at A&AEE” - World War Photos

This is Airacobra Mk.I (Model 14) AH577 at RAF Duxford. There are two .303 Browning guns in the port wing here.
Source [3]

This is a line-up of Airacobra Mk.Is (Model 14s) at RAF Duxford. In the centre is Airacobra Mk.I (Model 14) AH589, UF-L.
Source [8]

This is Airacobra Mk.I (Model 14) AH601, UF landing at RAF Duxford.
Source [7]

Do you have a source for this?

Got to be careful here, the majority of Airacobras with No. 601 Squadron have six fishtail style exhausts on each side.

Sources

[1] Squadrons No.9 The Forgotten Fighters (2015) by Phil Listemann
[2] Bell P-39 Airacobra (2000) by Robert F. Dorr with Jerry C. Scutts
[3] Imperial War Museum Collections
[4] USAF Aircraft Serial Number Search
[5] National Archives
[6] WW2 Aircraft
[7] Scale Models
[8] World War Photos

1 Like

good GE plane

Thanks for the clarification regarding the British designation. You’re right. After reviewing the photographs again, it became clear that there was no single, unique exhaust configuration for the Bell Model 14 in RAF service. Instead, the RAF fitted two different exhaust types depending on availability for their operational Airacobra aircraft, which is quite interesting.

OP, I recommend that you specify one of the two Bell Models (13 or 14) for this suggestion’s title first. Since you stated you focused on the P-39C, it’s the Bell Model 13, which was already suggested here. You can then submit a separate suggestion for the Bell Model 14 under the same designation, Airacobra Mk. I, of course.