Spartan C4

The Spartan C4 is an American four-seat cabin monoplane designed and built by the Spartan Aircraft Company.[1]

Spartan C4
Role Four-seat cabin monoplane
National origin United States
Manufacturer Spartan Aircraft Company
First flight 1930
Number built 7
Developed into Spartan C5

Design and development

The first model was the C4-225 a high-wing braced monoplane powered by a 225 hp (168 kW) Wright J-6 radial engine.[1] Only five C4-235 aircraft were built and they were followed by one C4-300 with a 300 hp (224 kW) Wright R-975 radial engine, and the C4-301 with a 300 hp (224 kW) Pratt & Whitney Wasp Junior.[1]

Variants
C4-225
Production aircraft powered by a 225hp (168kW) Wright J-6 radial engine, five built.[1]
C4-300
Variant with a 300hp (224kW) Wright R-975 radial engine, one built.[1]
C4-301
Variant with a 300hp (224kW) Pratt & Whitney Wasp Junior radial engine, one built.[1]

Specifications (C4-225)

Data from Jane's all the World's Aircraft 1931[2]

General characteristics

  • Crew: 1 or 2
  • Capacity: 2 or 3 pax, (four seats total)
  • Length: 50 ft (15 m)
  • Wingspan: 32 ft 3.75 in (9.8489 m)
  • Height: 9 ft (2.7 m)
  • Wing area: 299 sq ft (27.8 m2)
  • Empty weight: 2,325 lb (1,055 kg)
  • Gross weight: 3,515 lb (1,594 kg)
  • Fuel capacity: Fuel: 85 US gal (71 imp gal; 320 l) in two wing tanks; Oil: 6 US gal (5.0 imp gal; 23 l)
  • Powerplant: 1 × Wright J-6 9-cylinder air-cooled radial piston engine, 240 hp (180 kW)
  • Propellers: 2-bladed fixed pitch steel propeller

Performance

  • Maximum speed: 129.7 mph (208.7 km/h, 112.7 kn)
  • Cruise speed: 109 mph (175 km/h, 95 kn)
  • Landing speed: 51 mph (44 kn; 82 km/h)
  • Service ceiling: 15,000 ft (4,600 m) service
  • Rate of climb: 905 ft/min (4.60 m/s) initial
  • Wing loading: 11.7 lb/sq ft (57 kg/m2)
  • Power/mass: 14.65 lb/hp (8.91 kg/kW)
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See also

Related development

References

Notes
  1. Orbis 1985, p 2955
  2. Grey, C.G., ed. (1931). Jane's all the World's Aircraft 1931. London: Sampson Low, Marston & company, ltd. pp. 318c–319c.

Bibliography
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