Sikorsky S-4

S-4
	S-4 displayed at an exhibition in Kharkov in the spring of 1911
Role	Experimental
National origin	Russian Empire
Designer	Igor Sikorsky
Introduction	1911
Number built	1
Developed from	Sikorsky S-3

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 was never flown but did appear in a static display at an aeronautical exhibition at Kharkov in the spring of 1911. Sometime afterward it was disassembled.[1][2]

Specifications

Data from Russian Aviation Museum[3]

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 m²)
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

References

Sikorsky, Igor (1944). The Story of the Winged-S. New York: Dodd, Mead & Company. p. 43. ISBN 9781258163556.
"Sikorsky S-4 1911". www.aviastar.org. Retrieved 5 April 2017.
"S-4". ram-home.com. 4 September 1997. Retrieved 4 April 2017.

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[winged-1] Sikorsky, Igor (1944). The Story of the Winged-S. New York: Dodd, Mead & Company. p. 43. ISBN 9781258163556.

[avi-2] "Sikorsky S-4 1911". www.aviastar.org. Retrieved 5 April 2017.

[ram-3] "S-4". ram-home.com. 4 September 1997. Retrieved 4 April 2017.

Sikorsky aircraft
Fixed-wing aircraft (company designations)	S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 S-9 S-10 S-11 S-12 S-13 S-14 S-15 S-16 S-17 S-18 S-19 S-20 S-21 S-22 S-23 S-24 S-25 S-26 S-27 S-28 S-29-A S-30 S-31 S-32 S-33 S-34 S-35 S-36 S-37 S-38 S-39 S-40 S-41 S-42 S-43 VS-44 S-45
Fixed-wing aircraft (military designations)	C-6 C-28 JRS JR2S PS RS XBLR-3 XPBS XSS XV-2
Helicopters (company designations)	VS-300 (S-46) S-47 S-48 S-49 S-50 S-51 S-52 S-53 S-54 S-55 S-56 S-57 S-58 S-59 S-60 S-61 S-61L/N S-61R S-62 S-63 S-64 S-65 S-66 S-67 S-68 S-69 S-70 S-71 S-72 S-73 S-74 S-75 S-76 S-80 S-92 S-97 S-100 S-300 S-333 S-434
Helicopters (military designations)	SH-3 HH-3E/F R-4 H-5 H-6 H-18 H-19 H-34 CH-37 XH-39 HH-52A CH-53 CH-53E CH-53K MH-53 CH-54 UH-60 HH-60G HH-60J/MH-60T MH-60R/S SH-60B/F H-60J/K VH-60 RAH-66 VH-92 CH-124 CH-148 HLH
Experimental aircraft	Cypher/Cypher II Firefly Raider Raider X SB-1 X2 XBLR-3 XV-2