Boeing FB-5 Hawk – Walk Around

The Boeing Model 15 was a United States open-cockpit biplane single-seat fighter aircraft of the 1920s, manufactured by the Boeing company. The Model 15 saw service with the United States Army Air Service (as the PW-9 series) and with the United States Navy as a carrier-based fighter (as the FB series).

FB-5 : 27 built, production version. Powered by 520 hp (390 kW) Packard 2A-1500 engine. Boeing Model 67.

Source: Wikipedia
Seen on the forum japan-militaire.com