National Museum of the USAF   Right Corner Banner
Join the Air Force

Home > Fact Sheets > Boeing Y1B-17A


Posted 11/30/2006 Printable Fact Sheet
Previous ImageNext Image
Boeing Y1B-17A
Boeing Y1B-17A in flight near Mt. Rainier on Feb. 28, 1938. (U.S. Air Force photo)
Download HiRes

The Boeing Model 299F was originally ordered as a static test bed; however, it was converted to a flight capable aircraft for testing supercharged engines. This converted aircraft was designated Y1B-17A and was one of a kind. A variety of engine installations and configurations eventually led to the bottom-mounted turbo-supercharger, which became standard on the B-17B -- the first production model of the B-17 series of bombers. The turbo-superchargers allowed the aircraft to fly higher and faster than the non-supercharged YB-17. Once testing was complete, the Y1B-17A became the B-17A.

Type Number built/
Y1B-17A 1 Supercharged engine test aircraft

Serial number: 37-369
Notes: Boeing Model 299F originally ordered as a static test aircraft; became B-17A after completion of testing

103 ft. 9 in.
Length: 68 ft. 9 in.
Height: 15 ft. 0 in.
Weight: 37,000 lbs. gross
Armament: Five .30-cal. (or .50-cal.) machine guns and eight 600-lb. bombs
Engines: Four Wright R-1820-51 turbo-supercharged radials of 1000 hp each

Maximum speed: 295 mph at 25,000 ft.
Cruising speed: 183 mph
Service ceiling: 38,000 ft.
Range: 3,600 miles (maximum ferry range)

Click here to return to the 1930s Bomber index.

 Inside the Museum

ima cornerSearch

ima cornerAircraft


tabRelated Links

Museum Virtual TourMuseum Facebook PageMuseum Twitter PageMuseum Instagram
Museum Google Plus PageMuseum Pinterest PageMuseum YouTube ChannelMuseum Flickr Page
Museum PodcastsMuseum E-newsletter Sign-upMuseum RSS Feeds

Site Map      Contact Us     Questions     Security and Privacy notice     E-publishing  
Suicide Prevention    SAPR   IG   EEO   Accessibility/Section 508   No FEAR Act