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Sikorsky S-52
| Sikorsky S-59 | |
|---|---|
| Sikorsky S-59 | |
| Type | Helicopter |
| Manufacturer | Sikorsky Aircraft Corporation |
| Maiden flight | 12 February 1947 |
| Introduced | April 1951 |
| Primary users | United States Navy United States Marine Corps |
| Produced | 93 (including four Army trials aircraft) |
| Number built | one[1] |
| Variants | XH-39 |
The Sikorsky H05S-1 (company model S-52) was a utility helicopter developed by Sikorsky Aircraft Corporation in 1950, used by the U.S. Navy, Marines, and Coast Guard (as the HO5S-1G).[2]
The prototype S-52, first flown in 1947, was a two-seater and used a 178 hp (133 kW) Franklin air-cooled flat-6 piston engine (like that used in the Tucker Torpedo).[3]
It was modified as the S-52-2 was a four-seat helicopter using a 245hp (183 kW) Franklin O-245-1 air-cooled flat-6. It had a semi-monocoque fuselage of pod-and-boom arrangement (with large bubble-like front greenhouse,[4] two-blade rotor, and quadricycle fixed landing gear.
The first American helicopter to have all-metal rotor blades,[5] the prototype[6] set several speed and height records in 1948, including 129.6 mph (204.2 km/h) on a 3 km (2 mi) course, 122.75 mph (197.54 km/h) on a 1 km (1100 yd) circuit, and absolute height 21,220 ft (6468 m).[7] It was capable of hover out of ground effect at 5,900 ft (1,798 m) or 9,200 ft (2,804 m) in ground effect.[8]
The Navy operated the aircraft as a utility type, and it was used by the Marines for observation and scouting in Korea,[9] where the HO3S proved more popular. Four S-52s were evaluated by the United States Army for utility use, as the H-18, but not purchased.
The S-52 also served as the basis of the turbine-powered S-59, which as the XH-39 competed for and lost the contract that produced the Bell UH-1. This aircraft differed in having a four-bladed rotor (against the S-52's three)[10] and retractable tricycle gear.[11]
Operators
Specifications
Related lists
Lists relating to aviation | |
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| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
References
Notes
- ↑ Polmar, Norman, and Kennedy, Floyd D., Jr. Military Helicopters of the World (Annapolis, MD: Naval Institute Press, 1981), p.288.
- ↑ Donald, David, ed. Encyclopedia of World Aircraft, (Etobicoke, Ontario: Prospero Books, 1997), p. 840, "Sikorsky S-52".
- ↑ Donald, p. 840, "Sikorsky S-52".
- ↑ Polmar and Kennedy, p.288.
- ↑ Polmar and Kennedy, p.288; Donald, p.840, "Sikorsky S-52".
- ↑ Donald, p.840, "Sikorsky S-52".
- ↑ Polmar and Kennedy, p.288.
- ↑ Polmar and Kennedy, p.288.
- ↑ Polmar and Kennedy, p.289 caption.
- ↑ Polmar and Kennedy, p.288.
- ↑ Polmar and Kennedy, p.288.
Sources
- Donald, David, ed. Encyclopedia of World Aircraft, p.840, "Sikorsky S-52". Etobicoke, Ontario: Prospero Books, 1997. ISBN 1-85605-375-X.
- Polmar, Norman, and Kennedy, Floyd D., Jr. Military Helicopters of the World. Annapolis, MD: Naval Institute Press, 1981. ISBN 0-870321-383-0.
- "Sikorsky Model XH-39 (S-59)." at Global Security] (accessed 12 May 2008)
 | This military aviation article is a stub. You can help Wikipedia by expanding it. |
Template:US Army-aircraft-stub Template:US-Army-stub
 | This article on an aircraft of the 1950s is a stub. You can help Wikipedia by expanding it. |
Template:US Army helicopters Template:Sikorsky Aircraft
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
