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Lockheed P-38 Lightning Competitors

Pioneer

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Lockheed P-38 Lightning Competitors

In 1936 the US Army Air Corps (USAAC) put out a tender for a ‘Twin-engine, High Altitude Interceptor’ that was designated as ‘X-608’

The winner of this competition would be the Lockheed Model 22 / P-38 Lightning.
But does anyone know of the proposals to ‘X-608’ submitted by the other aviation company’s that the USAAC approached – Boeing, , Consolidated, Curtiss, Douglas and Vultee.

Do you have their designations, technical data, drawings, art work etc…….

Regards
Pioneer
 

elmayerle

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There was an old issue of the AAHS Journal that had an article on Gerald Vultee's entry.
 

Tophe

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I have read somewhere that there have been also a Hughes entry in the X-608 competition, a twin-boomer, and Howard Hughes then accused Lockheed of illegal copy. This was far before the D-5 design and even before the D-2.
I'd be happy if I ever see a picture of this secret twin-boomer...
 

Pioneer

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Does anyone have a copy of that old issue of the AAHS Journal that had the article on Gerald Vultee's entry?

That sounds like Howard Hughes (have you read his autobiography ?)
I to would be interested in this secret twin-boom Hughes design

Thanks guys!

Regards
Pioneer
 

lark

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The Vultee Model 70 is in :
Journal , American Aviation Historical Society /Winter 1995.
3 variants differing mainly in the prop.configuration.
 

devi

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1) Boeing Model 3??
2) Consolivated Model ?
3) Curtiss Model ?
4) Douglas Model ?
5) Lockheed Model 22
6) Vultee Model XP1015/Model V-35(and or XP-35)
 

Antonio

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Hi Devi,

where did you foud this designations for Vultee?. Can you give more info?. They are unknown for me and not related from Vultee's number system.

You can get the project list from "Vultee Aircraft 1932-1947" by Jonathan Thompson. Ed Narkiewicz//Thompson ISBN 0-913322-02-4. It runs from 1 to 99. All numbers from 100 on were Convair.

Model 70 , as lark posted earlier, is the right entry in the X-608 competition. This pursuit fighter was propelled with the Allison V-1710. Unfortunately I have no more info and no drawing.

Cheers
Antonio
 

devi

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Hi pometablava

Vultee Model 70 participated in competition R-40C (XP-54 ---XP-56).

Vultee Model XP1015 (also known as Model XP-35/Model 35) participated in competition X-608.
Source:Journal AAHS,1988,V.33,N1(Spring): Vultee "P-38"(Model XP1015) and soviet old book(Clause about Vultee XP-35 ).
 

Antonio

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Thanks a lot Devi, you're very kind.

This is a very interesting info. I have also some additional data from "Vultee Aircraft 1932-1947"
Vultee studied a twin boom, single pusher engine pursuit fighter in 1939 under designation Model V-78 (I have drawings from two different variants). An oversized development designated Model V-84 was Vultee's entry for R-40C (XP-54). The XP-68 (reengined XP-54) retained the Model V-84 designation.
In the book there is also an unclear Model V-84E which I don't know what it is.


Antonio
 

Antonio

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I have read somewhere that there have been also a Hughes entry in the X-608 competition, a twin-boomer, and Howard Hughes then accused Lockheed of illegal copy

Dear Tophe,

According to Le Fana de l'Aviation Nº429 (Août 2005) it never existed a Hugues contender for X-608. Hugues wanted new aircraft to go beyond its own record with the Lockheed 14-N2. He ned a fighter-type aircraft which was designated D-2 and studies started in 1938. The Lockheed Model 22 (XP-38) was submitted to the USAAC in April 1937. Even the twin boom fighter was not a Lockheed invention, the Fokker G.1 was the star at Le Salon de l'Aéronautique parisien in 1936.
When Hugues tried to sell the D-2 to the Air Force, he claimed that the P-38 was a copy of its own concept but this was only a
marketing tactic.

Antonio
 

Antonio

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Dear folks,

everyone interested in the P-38 must have a copy of "The Lockheed P-38 Lightning" by Warren M Bodie. Widewing Publications. ISBN 0-9629359-0-5. It is a masterpiece


Devi, you're right. I get confirmation about Vultee's X-609, it is the XP 1015 (Experimental in house designation) Model V-35.
with 2 Allison V-1710 engines
 

devi

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Hi pometablava.

If there is in the book " The Lockheed P-38 Lightning " projects designation of other competitors of program X-608, shall forgive tell to us:

1) Boeing Model 3??
2) Consolivated Model ?
3) Curtiss Model ?
4) Douglas Model ?
5) Lockheed Model 22
6) Vultee Model XP1015/Model V-35(and or XP-35)


If there is in the book " The Lockheed P-38 Lightning " projects designation of other competitors of program CP39-775 (Lockheed XP-49, Grumman XP-50) shall forgive tell to us:

1) Grumman G-41---------------------------------later G-45 (XP-50)
2) Lockheed Model 222/model L-106-------later Model 522/L-106 (XP-49)
3) ? Model ? --------------------------later Model ?
4) ? Model ? --------------------------later Model ?
 

Antonio

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According to "The American Fighter" from Angelucci and Bowers the X-608 contenders were Consolidated, Curtiss, Douglas, Lockheed and Vultee but in Warren M Bodie book there are references to Lockheed, Curtiss and Vultee submissions.

From page 16:
although we have never managed to find even a single sketch of the Curtiss interceptor design entry, it was probably a version of the A-18 with single seat and two Allisons

The Curtiss A-18 Shrike from 1937 was Model Type 76A (Minidocavia 2. "A-comme Attaque". Alain Pelletier. Editions Larivière)
 

Antonio

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If there is in the book " The Lockheed P-38 Lightning " projects designation of other competitors of program CP39-775 (Lockheed XP-49, Grumman XP-50) shall forgive tell to us:

I have never found references to different submissions other than XP-49 and XP-50 for CP39-775 long range escort fighter
 

Tophe

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Thanks for reminding the competition XP-49/XP-50 - that made me draw a what-if XP-50-like Lightning, at http://www.whatifmodelers.com/forum//index.php?showtopic=4626&st=400&#entry158793
Thanks again for enriching our dreams.
 

lark

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The research by Devi concerning the Vultee model 35 is correct
The Vultee model 70 mentioned earlier was responding to
Air Corps type spec.XC 622 of November 1939 for a single
engined single seat pursuit.
Thus much later than XC 608 .
Well done Devi and Pometablava...
 

hesham

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Hi,

and may be the Boeing proposal was the Model-306C,the drawing is from this topic;

http://www.secretprojects.co.uk/forum/index.php/topic,304.0/highlight,boeing+306.html
 

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Stargazer2006

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Elsewhere I read that the Model 306A, also a flying-wing design, was a bomber project. So is it possible that the 306C could be a pursuit project?
 

toura

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hi Stargazer,
Look "secret projets"
Boeing flying wings projects of 1930
Bye
 

hesham

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Hi,

the Vultee XP-1015;
http://www.secretprojects.co.uk/forum/index.php/topic,4181.0/highlight,vultee.html
 
J

joncarrfarrelly

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pometablava said:
Thanks a lot Devi, you're very kind.

This is a very interesting info. I have also some additional data from "Vultee Aircraft 1932-1947"
Vultee studied a twin boom, single pusher engine pursuit fighter in 1939 under designation Model V-78 (I have drawings from two different variants). An oversized development designated Model V-84 was Vultee's entry for R-40C (XP-54). The XP-68 (reengined XP-54) retained the Model V-84 designation.
In the book there is also an unclear Model V-84E which I don't know what it is.


Antonio

My reading of Thompson's text is that the Model V-84 became the Model V-84E (XP-54 41-1210) when the engine was changed from the P&W X-1800 to the Lycoming XH-2470.

Jon
 

Stargazer2006

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Very interesting thread! I like the P-54 and find it unfair that although the winner over the the Curtiss and Northrop designs, it is the least known of the three... I didn't know that the XP-68 retained the V-84 designation, although it's pretty logical. Now was the XP-68 really called the "Tornado", as some sources claim, or was it a confusion with the Tornado engine? Also I once found that the XP-54 had been developed for Specification "24-C", although we know it was in fact R-40C. Could it be that there was an earlier specification that was overridden by R-40C for some reason? The earlier V-78 "Shrike" project is also said to have been for the same competition...
 

Stargazer2006

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pometablava said:
According to "The American Fighter" from Angelucci and Bowers the X-608 contenders were Consolidated, Curtiss, Douglas, Lockheed and Vultee but in Warren M Bodie book there are references to Lockheed, Curtiss and Vultee submissions.

Another source I once took notes from listed the same but replaced Lockheed by Boeing... :-\
 

Nico

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Pioneer said:
Lockheed P-38 Lightning Competitors

In 1936 the US Army Air Corps (USAAC) put out a tender for a ‘Twin-engine, High Altitude Interceptor’ that was designated as ‘X-608’

The winner of this competition would be the Lockheed Model 22 / P-38 Lightning.
But does anyone know of the proposals to ‘X-608’ submitted by the other aviation company’s that the USAAC approached – Boeing, , Consolidated, Curtiss, Douglas and Vultee.

Do you have their designations, technical data, drawings, art work etc…….

Regards
Pioneer

Was 1936? I found a note quoting February 1937 (but I lack the source...)
Nico S.
 

Richard N

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From a very old issue of "Flying" in my library.
 

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hesham

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Hi Richard N,


I think it was a fake design,not real at all.
 

Johnbr

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1937 competition X-608 -- issued 01/08/1937:

-- twin-engine interceptor, 360-400 mph @ 20,000', climb to 20,000' in 6 min.

-- Lockheed Model 22-64-01 -- proposal submitted 04/1937; contract for prototype awarded 06/23/1937; first flight 01/27/1939; becomes P-38

-- Vultee XP1015

-- Boeing (not specified)

-- Consolidated (not specified)

-- Curtiss (not specified)

-- Douglas (not specified)
 

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Antonio

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Topics merged


XP-1015 specific topic here:

http://www.secretprojects.co.uk/forum/index.php/topic,4181.0/all.html
 

RyanCrierie

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The final standing and measures of merit in the X-608 competition were:

Lockheed 65%
Hughes 47.3%
Vultee 45.4%
Vought 41.5%

The Hughes designation was H-1 and attached is a picture.
 

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hesham

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Amazing and great find my dear Ryan,

please can you named those Projects ?,for example Hughes H-1,Lockheed Model-?,and
...elt
 

RyanCrierie

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My dear Hesham, the stuff I found is found here:

LINK

LINK 2

link 3

reprinted in the Truman Committee senate hearings; because Hughes was still butt-hurt over losing the P-38 competition to Lockheed, so for some reason these documents were entered into the congressional record.
 

hesham

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Thank you my dear Ryan,

and there was also Hughes H-2 ?.
 

hesham

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RyanC said:
The final standing and measures of merit in the X-608 competition were:

Lockheed 65%
Hughes 47.3%
Vultee 45.4%
Vought 41.5%

When you search in Vought list,you find nothing about that proposal ?.
 

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sienar

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RyanC said:
My dear Hesham, the stuff I found is found here:

LINK

LINK 2

link 3

reprinted in the Truman Committee senate hearings; because Hughes was still butt-hurt over losing the P-38 competition to Lockheed, so for some reason these documents were entered into the congressional record.

I've been looking through these documents and found the 2 place design Hughes submitted to this competition under the H-2 designation.
 

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Stargazer2006

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Awesome discoveries, RyanC and sienar, thanks for these!

It's annoying though that Hughes reused the H-1 designation which was already that of his 1935 racer...
 

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