five Y1B-9A service test aircraft (Boeing Model 246) had the Pratt & Whitney R-1860-11 Hornet B engines which powered the re-engined YB-9 and Y1B-9 and...

faster than the Y1B-17. When testing was completed, the Y1B-17A was reconfigured as a B-17A. Wikimedia Commons has media related to Boeing B-17B. The B-17B...

Flying Fortress List of Boeing B-17 Flying Fortress variants Boeing Y1B-20 Boeing B-29 Superfortress Boeing KB-29 Superfortress Boeing XB-39 Superfortress...

Retrieved: 9 January 2007. "Boeing Y1B-17". Archived 16 May 2007 at the Wayback Machine National Museum of the United States Air Force. Retrieved: 9 January...

260 lb (1,025 kg) Aircraft of comparable role, configuration, and era Boeing Y1B-9 Tupolev SB Related lists List of bomber aircraft List of military aircraft...

XB-1 Douglas Y1B-7 Fokker XB-8 Boeing Y1B-9 Douglas YB-11 Martin XB-13 Martin XB-14 Boeing XB-15 Martin XB-16 Douglas XB-19 Boeing Y1B-20 North American...

began service testing the Boeing Y1B-9, the first American all-metal monoplane bomber aircraft design. The high speed of the Y1B-9A indicated that open cockpits...

was activated. In January 1936, the Air Corps contracted with Boeing for thirteen Y1B-17 Flying Fortress prototypes, enough to equip one squadron for...

Atlantic XB-8 Bellanca TES (1930 version) Berliner-Joyce P-16 Boeing XP-9 Boeing Y1B-9 Consolidated A-11 Consolidated P-30 Consolidated Y1P-25 Curtiss...

steam locomotive model Bensen B-9, a 1958 American small helicopter Boeing B-9 (sometimes referred to as the Y1B-9 or YB-9), a 1931 United States Army Air...