On Mon, 03 Mar 2008 11:19:35 -0500, Bill Shatzer
>I had thought both the B-25 and the B-26 arose from the same 1939 USAAF
>specification and request for proposals and thus the two designs were
>roughly contemporaneous.
Yes, the U.S. Army often twinned its RFPs, realizing that aircraft
design in the 1930s/1940s was an imprecise art, and that one of the
planes might not pan out. Thus the B-25/26, B-35/36 etc.
Indeed, when it came to the first jet bomber, the order was
quadrupled: B-45/46/47/48, of which the 45 and 47 went into
production, and the 47 became the mainstay medium jet bomber.
Blue skies! -- Dan Ford
Claire Chennault and His American Volunteers, 1941-1942
new from HarperCollins www.FlyingTigersBook.com