Spartan C4
# Spartan C4

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

## 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. 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.

## Variants

### C4-225

    Production aircraft powered by a 225 hp (168 kW) Wright J-6 radial engine, five built.

### C4-300

    Variant with a 300 hp (220 kW) Wright R-975 radial engine, one built.

### C4-301

    Variant with a 300 hp (220 kW) Pratt & Whitney Wasp Junior radial engine, one built.

## Specifications (C4-225)

Data from Jane's all the World's Aircraft 1931

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 $m^2)$
* 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 $kg/m^2)$
* Power/mass: 14.65 lb/hp (8.91 kg/kW)
