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Douglas DB-4...?

lark

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In an article by René Francillon for Air Magazine N°47-Octobre 2009
mention is made of a bomber development of the Douglas DC-4E liner
under the designation DB-4.

This design was offered to the U.S.Army Air Corps in 1938 to replace
the XB-19 who was already almost outdated at that time.

Is there anyone who haves more information or illustrations..

Thanks in advance.
 

archipeppe

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lark said:
In an article by René Francillon for Air Magazine N°47-Octobre 2009
mention is made of a bomber development of the Douglas DC-4E liner
under the designation DB-4.

This design was offered to the U.S.Army Air Corps in 1938 to replace
the XB-19 who was already almost outdated at that time.

Is there anyone who haves more information or illustrations..

Thanks in advance.

Did the DC-4E was acquired by Japan in order to obtain a bomber??
 

lark

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The Nakajima G5N1 who was based on DC-4E technology has nothing
to do with the planned DB-4...

This should have been a entirely different design.
By the way , in Air Classics , mention is made that the
initial concept for the XB-19 should have been a six engined design.
Maybe this is related to the Douglas 6 engined bomber in the 'US bombers' thread.
 

frank

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Hmm. I've mentioned before that I've read somewhere that Douglas had offered a bomber version of the DC-4 in their designs for the XB-31. This has me wondering if they meant the DC-4E!


lark said:
In an article by René Francillon for Air Magazine N°47-Octobre 2009
mention is made of a bomber development of the Douglas DC-4E liner
under the designation DB-4.

This design was offered to the U.S.Army Air Corps in 1938 to replace
the XB-19 who was already almost outdated at that time.

Is there anyone who haves more information or illustrations..

Thanks in advance.
 

airman

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any pics of original Douglas DB-4 ?

here and below link and images of Nakajima G5N Shinzan born by project of Douglas DC-4E (
http://www.j-aircraft.com/gallery/navy/g5n_gallery/g5n-peter_fearis_01l.jpg
 

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Stargazer2006

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lark said:
In an article by René Francillon for Air Magazine N°47-Octobre 2009
mention is made of a bomber development of the Douglas DC-4E liner
under the designation DB-4.
Surprising since the DB-4 designation had already been given to the B-18A Bolo.
I'm not saying this is impossible, however, considering the DC-4, DC-7 and DC-8 designations were all re-allocated to newer designs.

See here for the bomber development of the first DC-4:
http://www.secretprojects.co.uk/forum/index.php/topic,488.msg157967.html#msg157967
 

lark

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The Douglas DB-4 design, together with the Boeing Y1B-20
are mentioned as follow on designs for the XB-15
by Bill Norton in his brilliant new book

"American Bomber Development in WW 2" ....
 

gatoraptor

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There is a great article about this topic in the new issue 28 of "The Aviation Historian".

"we examine the – ultimately fruitless – attempts to turn Douglas’s DC-4E airliner and its smaller brother the DC-4/C-54 into bombers"
 

ACResearcher

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I do hope you will all get a copy of the latest "The Aviation Historian", Issue 28. In it I recount what is - and may well remain so - the most complete history of the attempts to make the DC-4E and, eventually, the DC-4 into bombers.

In the meantime I shall correct some errors in Bill Norton's book. The DB-4/DC-4E bomber design did indeed come AFTER the Y1B-20, but was not exactly a "follow on" Project. The DC-4E bomber was Douglas' entry into CP 39-645, a relatively hastily written Emergency Proposal to basically jump through the right hoops so the AAF could order the B-24, a decision they had already made. It is my belief that Douglas submitted this bomber version in order to recoup its investment in the DC-4 (as it was then known) due to the fact that once the prototype was built all the airlines that had participated in its design and building summarily rejected it. The reasons for this, as well as the AAF's engineering reports on both the DB-4 and the DC-4/DS-300 bomber submissions, are all lovingly recounted from the original AAF documents in this new article, including a number of new drawings of both. It was - to me - a fascinating story of virtually unknown (and generally badly researched) aircraft projects.

I hope you will enjoy reading the article as much as I enjoyed writing and illustrating it. I have to hand it to the chaps at TAH for the beautiful job of layout they did. They are true pros.

Submitted for your consideration,

AlanG
 

hesham

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I have a copy of picture to a Model for this Project,but the scanner is out of service now.
 
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