The LB 15 and 16 were designations for Long-Range Bombers, that became the Boeing XB-15 (single prototype) and Martin XB-16 (unbuilt). The Long-Range (it was originally the XBLR-15 and 16) Bomber designation was dropped during development, and these just became heavy bomber designs using the B (Bomber) designation.
No, the LRB specification was pared down and the US got the B-17 then B-24 and that sort of 4-engine bomber. From there, the next generation was the B-29 / B-32 super heavy and the LRB became the B-36 program of intercontinental bomber.So, this competition resulted in 2 engined "medium" bombers, not large b-15 type aircraft
No,that was not right at all,the LB-15 and LB-16 were from Keystone
designation series,they are not related to Boeing or Martin concepts ?!,
but to be honest,they did not confirmed.
I'd say there was definitely some confusion with designations by the USAAC in the 30's then.
No,that was not right at all,the LB-15 and LB-16 were from Keystone
designation series,they are not related to Boeing or Martin concepts ?!,
but to be honest,they did not confirmed.
In this context, the LB-15 and LB-16 were part of the 1924-1930 US Army Air Corps 'Light Bomber' designation sequence.
It is true that most LB designations were assigned to Keystone designs. But there were also designs from Huff-Daland (LB-1, XLB-3, and LB-5), Atlantic (LB-2), and Martin (LB-4).
-- http://www.joebaugher.com/Bdesig.html
In this context, the LB-15 and LB-16 were part of the 1924-1930 US Army Air Corps 'Light Bomber' designation sequence.
It is true that most LB designations were assigned to Keystone designs. But there were also designs from Huff-Daland (LB-1, XLB-3, and LB-5), Atlantic (LB-2), and Martin (LB-4).
-- http://www.joebaugher.com/Bdesig.html
I know that dear Apophenia,
but as I mentioned before,an encyclopedia defined them as two designs for
Keystone,even it didn't clorify if they were a projects or not,could be a misprint,frankly I don't know ?!.
I'd say there was definitely some confusion with designations by the USAAC in the 30's then.
Wouldn't hurt much to mention that I'm the one who did that research and provided the file in the first place! Here is the PDF...Attached is the first designation series by Type.