Grumman XSBF

Power was provided by a 650 hp (480 kW)Pratt & Whitney R-1535 Twin Wasp Junior air-cooled radial engine driving with a variable-pitch propeller.

The arrestor hook was carried in a fully enclosed position, while flotation bags were fitted in the wings in case the aircraft was forced to ditch.

[7] Following initial testing, which found the aircraft to be reasonably faultless, the XSBF-1 was delivered to the U.S. Navy for evaluation in competition with two other biplanes submitted to the 1934 specification, the Great Lakes XB2G and the Curtiss XSBC-3.

[8] With the competition lost, the development of the XSBF-1 came to an end;[8] the sole prototype was assigned to Naval Air Station Anacostia, where it had been tested, for use as a liaison aircraft and hack.

[1] The SBF-1 designation, unusually, was re-used by the Navy during World War II, assigned to SB2C Helldivers produced under license by Fairchild Aircraft.