Sikorsky S-31

Role	Civil utility sesquiplane Type of aircraft
National origin	United States
Manufacturer	Sikorsky Manufacturing Corporation
First flight	September 1925
Number built	1

The Sikorsky S-31 was a 1920s American sesquiplane designed and built by the Sikorsky Manufacturing Corporation and configured for aerial photography.^[1]

Design and development

The S-31 was a sesquiplane built for photographic work by the Fairchild Flying Corporation. It had two open cockpits and a cabin for the photographic equipment.^[1] The S-31 was powered by a 200 hp (149 kW) Wright Whirlwind J-4 engine and first flew in September 1925.^[1] Following participation in the New York Air Races in October 1925 it was shipped to Brazil to be used by Fairchild for aerial photographic work. At some point the S-31 had twin Lewis machine guns ring-mounted on the rear cockpit.^[1]

Specifications

Data from ^[1]

General characteristics

Crew: two
Length: 26 ft 0 in (7.92 m)
Wingspan: 45 ft 0 in (13.72 m) ^[2]
Height: 10 ft 4 in (3.15 m)
Wing area: 260 sq ft (24.15 m²) ^[2]
Empty weight: 1,700 lb (771 kg)
Gross weight: 2,900 lb (1,315 kg)
Powerplant: 1 × Wright Whirlwind J-4 , 200 hp (149 kW)

Performance

Maximum speed: 35 mph (56.3 km/h, 30 kn)
Endurance: 6 hours 0 minutes
Service ceiling: 15,000 ft (4,572 m)

References

Wikimedia Commons has media related to Sikorsky S-31.

^ ^a ^b ^c ^d ^e Best, Martin (1990). "Sikorsky American Fixed-Wing Aircraft - Part 1 S-29A to S-35". Archive. 2002 (4). Air-Britain: 127–133. ISSN 0262-4923.
^ ^a ^b Upper wing

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