Stearman C3

1st Flight 1927

The Stearman C3 was an American built  biplane aircraft of the 1920s.

The C3 was a rugged biplane with simple straight wings, a tough undercarriage with oleo shock absorbers and two open cockpits with the pilot in the rear and two side-by-side passenger seats in the front.

In fact, it was a slightly modified version of the earlier model C2 aircraft.

Changes included an increased volume oil tank and larger sized baggage compartment.

Introduced in 1928, the C3 was powered by a variety of engines of between 128 hp and 225 hp, each version having its own designation.

The last version of the C3 was the C3R which had several external differences including a cut out in the aft portion of the wing centre section for improved pilot visibility, a headrest in the aft cockpit, and slightly increased chord of the rudder and vertical stabilizer.

The Peruvian air force used the C3 in various roles, the most common use was as a trainer.

Although there were several versions of the C3, most were either the C3B and the C3R.

A few C3s were approved for float operations.

Variants

C1

First of the C series powered by a Curtiss OX-5, later re-engined with a 240 hp (179 kW) Menasco-Salmson radial as the C1X.

C2

Four aircraft similar to the C1, with the radiator mounted underneath, hydraulic shock absorbers and dual controls.

Variously powered by 90 hp (67 kW) Curtiss OX-5, Wright-Hisso A, Wright Whirlwind and Menasco-Salmson radial engine.

C3B Sport Commercial

220 hp (164 kW) Wright J5 radial engine.

C3C

150 hp (112 kW) Wright Martin/Hispano Suiza E engine.

C3D

180 hp (134 kW) Wright Martin/Hispano Suiza E engine.

C3E

190 hp (142 kW) Wright Martin/Hispano Suiza E2 engine

C3F

190 hp (142 kW) Wright Martin/Hispano Suiza E3 engine.

C3G

190 hp (142 kW) Wright Martin/Hispano Suiza E4 engine.

C3H

260 hp (194 kW) Menasco-Salmson air-cooled engine.

C3I

160 hp (119 kW) Curtiss C6 engine.

C3K

128 hp (95 kW) Siemens-Halske Sh 12.

C3L

130 hp (97 kW) Comet 7D radial engine.

1 built, later converted to C3B.

C3MB

C3B with forward cockpit enclosed for mail carrying.

C3P

220 hp (164 kW) Wright J5 Whirlwind radial engine.

C3R Business Speedster

225 hp (168 kW) Wright J6.

Specifications

C3B

Crew

1

Capacity

2 passengers

Length

24 ft 0 in (7.32 m)

Wingspan

35 ft 0 in (10.68 m)

Height

9 ft 0 in (2.75 m)

Empty weight

1,650 lb (748 kg)

Max take-off weight

2,650 lb (1,202 kg)

Powerplant

1× Wright J5 , 220 hp (160 kW)

Performance

Maximum speed

126 mph (203 km/h, 109 kn)

Cruise speed

108 mph (174 km/h, 94 kn)

Range

620 mi (1,000 km, 540 nmi)

Rate of climb

1,000 ft/min (5.1 m/s)

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