Spartan C4

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

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

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 (220 kW) Wright R-975 radial engine, and the C4-301 with a 300 hp (220 kW) Pratt & Whitney Wasp Junior.^[1]

Variants

C4-225: Production aircraft powered by a 225 hp (168 kW) Wright J-6 radial engine, five built.^[1]
C4-300: Variant with a 300 hp (220 kW) Wright R-975 radial engine, one built.^[1]
C4-301: Variant with a 300 hp (220 kW) 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: One or Two
Capacity: 2 or 3 passengers, (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: 85 US gal (320 L; 71 imp gal) in two wing tanks;
Oil capacity: 6 US gal (23 L; 5.0 imp gal)
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 (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)

References

Notes

^ ^a ^b ^c ^d ^e ^f Orbis 1985, p 2955
^ Grey, C. G., ed. (1931). Jane's all the World's Aircraft 1931. London: Sampson Low, Marston & company, ltd. pp. 318c–319c.

Bibliography

Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.

[Orbis-1] ^ ^a ^b ^c ^d ^e ^f Orbis 1985, p 2955

[JAWA1931-2] Grey, C. G., ed. (1931). Jane's all the World's Aircraft 1931. London: Sampson Low, Marston & company, ltd. pp. 318c–319c.

[1]

[2]

v t e Spartan aircraft
Biplanes	C3 NP NS-1
High-wing monoplanes	C4 C5 E-4
Low-wing monoplanes	7X Executive 7W Executive 8W Zeus 12W Executive C2 UC-71