Boeing Model 15/PW-9/FB

1st Flight 1923

The Boeing Model 15 was a United States single-seat open-cockpit biplane 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).

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-Designation of one PW-9 re-engine with 510 hp (380 kW) Packard 1A-1500 engine.

Boeing Model 58.

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-Two FB-1s modified for carrier operation, 510 hp (380 kW) Packard 1A-1500 engine.

Boeing designation Model 53.

FB-3-Three built to evaluate 510 hp (380 kW) Packard 1A-1500 engine, floatplane model.

Boeing Model 55.

FB-4-One built, experimental model with a 450 hp (340 kW) Wright P-1 radial engine.

Boeing designation Model 54.

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

Boeing Model 67.

FB-6-One built, experimental model with a 450 hp (340 kW) Pratt & Whitney R-1340-B Wasp engine. Boeing Model 54.

Specifications

PW-9

Crew: one

Length: 23 ft 5 in (7.14 m)

Wingspan: 32 ft 0 in (0 m)

Height: 8 ft 2 in (2.49 m)

Wing area: 260 sq ft (24 m2)

Airfoil: Göttingen 436

Empty weight: 1,936 lb (878 kg)

Gross weight: 3,120 lb (1,415 kg)

Powerplant: 1 × Curtiss D-12 water-cooled V-12, 435 hp (324 kW)

Performance

Maximum speed: 159 mph (256 km/h, 138 kn)

Cruise speed: 142 mph (229 km/h, 123 kn)

Range: 390 mi (630 km, 340 nmi)

Service ceiling: 18,925 ft (5,768 m)

Rate of climb: 1,630 ft/min (8.3 m/s)

Wing loading: 12.0 lb/sq ft (58.7 kg/m2)

Power/mass: 0.14 hp/lb (0.22 kW/kg)

Armament

Guns: 2 × fixed .30 in (7.62 mm) machine guns

Bombs: 1 × 244 lb (111 kg) bomb.

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