Passage: Initially the Boeing Model 69, it was inspired by the results of tests on the FB-6, which was powered by a Pratt & Whitney R-1340B Wasp radial engine. Boeing set out to use this engine in a fighter designed specifically for carrier operations, using the same welded-tubing fuselage and wooden-frame wings as for the Model 15, and adding a large spinner to reduce air drag around the engine (this was dropped in production). Armament was either two .30 in (7.62 mm) machine guns, or one .30 in and one .50 in (12.7 mm); the lower wing had attachments for up to four 25 lb (11 kg) bombs, plus a fifth could be hung from the fuselage.

Question: What inspired the design of Boeings model 69?
results of tests on the FB-6