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Sikorsky S-18

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S-18
Sikorsky S-18
General information
Type	Fighter
National origin	Russian Empire
Manufacturer	Russian Baltic Railroad Car Works
Designer	Igor Sikorsky
Number built	2

TheSikorsky S-18 was a Russian twin engine aircraft designed byIgor Sikorsky and built by theRussian Baltic Railroad Car Works aviation division atPetrograd during World War I.

Design and development

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The S-18 was a large three baybiplane fighter/interceptor powered by two 150 hp (112 kW)Sunbeam Crusader V-8 water-cooled engines mounted on the lower wing in apusher configuration. The aircraft featured armor protection for both crew members with the gunner/observer seated in the nose and armed with a single machine gun. The aircraft was very heavy and with the less than reliable Sunbeam engines neither example built was able to leave the ground.^[1]^[2]

Specifications

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Data fromRussian Aviation Museum^[2]

General characteristics

Crew: Two
Length: 31 ft 10 in (9.7 m)
Upper wingspan: 54 ft 2 in (16.5 m)
Lower wingspan: 50 ft 2 in (15.3 m)
Wing area: 620 sq ft (58 m²)
Empty weight: 3,274 lb (1,485 kg)
Gross weight: 4,630 lb (2,100 kg)
Powerplant: 2 ×Sunbeam Crusader V-8, side-valve, water-cooled, piston engine, 150 hp (110 kW) each

Performance

Wing loading: 7.4 lb/sq ft (36.2 kg/m²) max load

References

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^"The Russian Years".www.sikorskyarchives.com. Retrieved6 May 2017.
^^a ^b"S-18".ram-home.com. 4 September 1997. Retrieved4 May 2017.

v t e 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-22/23/24/25/26/27 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 P2S 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-95 S-97 S-100 S-102 S-103 S-300 S-333 S-434
Helicopters (military designations)	SH-3 Sea King HH-3E/F R-4 H-5 H-6 H-18 H-19 Chickasaw H-34 Choctaw CH-37 Mojave XH-39 HH-52A Seaguard CH-53 Sea Stallion CH-53E Super Stallion CH-53K King Stallion MH-53 CH-54 Tarhe UH-60 Black Hawk HH-60G Pave Hawk HH-60J/MH-60T MH-60R/S Seahawk SH-60B/F Seahawk H-60J/K VH-60 RAH-66 Comanche VH-92 Patriot CH-124 Sea King CH-148 Cyclone HLH
Experimental aircraft	Cypher/Cypher II Firefly Raider Raider X SB-1 X2 XBLR-3 XV-2

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