Sikorsky S-4
# Sikorsky S-4

The Sikorsky S-4 was a Russian aircraft built by Igor Sikorsky using many components of the S-3 including the 40 hp (30 kW) Anzani three-cylinder engine. Construction of the biplane began in late December 1910 and was completed early in the spring of 1911. The machine appeared in a static display at an aeronautical exhibition at Kharkov in the spring of 1911, but was never flown. Some time afterward it was disassembled.

## Specifications

Data from Russian Aviation Museum

General characteristics

* Crew: One
* Length: 26 ft 3 in (8 m)
* Upper wingspan: 29 ft 6 in (9 m)
* Wing area: 300 sq ft (28 $m^2)$
* Empty weight: 573 lb (260 kg)
* Gross weight: 794 lb (360 kg)
* Powerplant: 1 × Anzani 3 -cylinder air-cooled fan piston engine, 40 hp (30 kW)

Performance

