The Boeing Model 15 was a United States single seat open cockpit biplane fighter aircraft of the 1920s.
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.
Variants
XPW-9
Three prototypes built for Air Service evaluation.
First aircraft scrapped at McCook Field on February 21, 1925,
Second static tested in October 1928 and the
Third was still flying in December 1928.
PW-9
First production variant, D-12 engine.
PW-9A
D-12C engine.
PW-9B
One modified PW-9A, delivered as PW-9B in 1927.
PW-9C
D-12D engine.
PW-9D
Final production variant.
XP-4
Boeing Model 58
Designation of one PW-9 re-engine with 510 hp (380 kW) Packard 1A-1500 engine.
AT-3
Designation of one PW-9A converted to single-seat trainer with Wright-Hispano engine.
FB-1
Ten built as FB-1s from initial order of 16, remaining six modified to other sub-types (FB-2, FB-3, FB-4). Powered by a 435 hp (324 kW) Curtiss D-12.
Initial Navy delivery, shore-based only.
FB-2
Boeing designation Model 53
Two FB-1s modified for carrier operation, 510 hp (380 kW) Packard 1A-1500 engine.
FB-3
Boeing Model 55
Three built to evaluate 510 hp (380 kW) Packard 1A-1500 engine, floatplane model.
FB-4
Boeing designation Model 54
One built, experimental model with a 450 hp (340 kW) Wright P-1 radial engine.
FB-5
Boeing Model 67
Production version.
Powered by 520 hp (390 kW) Packard 2A-1500 engine.
FB-6
Boeing Model 54
One built, experimental model with a 450 hp (340 kW) Pratt & Whitney R-1340-B Wasp engine.
FB-7
Proposed version powered by a Pratt & Whitney Wasp engine, not built.
