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

Home > Fact Sheets > Douglas Y1B-7

DOUGLAS Y1B-7

Posted 6/25/2009 Printable Fact Sheet
 
Photos
Previous ImageNext Image
Douglas Y1B-7
Douglas Y1B-7 with camouflaged paint scheme, taken March 28, 1933. (U.S. Air Force photo)
Download HiRes

The U.S. Army ordered seven improved XB-7s as Y1B-7 for service testing. The new aircraft were fitted with improved Curtiss Conqueror engines with 75 more hp each. These engines were fitted with three-blade propellers also. Additionally, the corrugated fuselage skin of the XB-7 was replaced with smooth skin for the service test aircraft. These features combined to give the Y1B-7 a top speed of 182 mph, 13 mph faster than the XB-7.

The Y1B-7 was evaluated, but never entered quantity production. This was mainly due to the small bomb load and the better aircraft already being designed (i.e. Martin B-10).


Type Number built/
converted
Remarks
Y1B-7 7 Service test XB-7


TECHNICAL NOTES:
Armament: Two Browning .30-cal. machine guns and 1,200 lbs. of bombs
Engines: Two Curtiss V-1570-27 Conquerors of 675 hp each
Top speed: 182 mph at sea level
Cruising speed: 158 mph
Service ceiling: 20,400 ft.
Range: Approx. 600 miles (400 with full bomb load)
Span: 65 ft. 3 in.
Length: 45 ft. 7 in.
Height: 12 ft. 1 in.
Weight: 11,177 lbs. gross
Crew: Four
Serial numbers: 32-308 to 32-314

Click here to return to the Bomber Aircraft index.







 Inside the Museum

ima cornerSearch

ima cornerAircraft

 


tabCategories
tabRelated Links
tabConnect

Museum Virtual TourMuseum PodcastsMuseum E-newsletter Sign-upMuseum RSS Feeds
Museum Facebook PageMuseum Twitter PageMuseum Pinterest PageMuseum Flickr PageMuseum YouTube Channel



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