User:BillCJ/Sandbox/Sikorsky S-52
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- This is a sandbox for the new Sikorsky S-52 article.
| S-52/H-18 | |
|---|---|
| Type | Utility helicopter |
| Manufacturer | Sikorsky |
| Primary users | United States Army United States Navy United States Marine Corps United States Coast Guard |
| Variants | Sikorsky S-59 |
The Sikorsky S-52-1 was the first US helicopter with all-metal rotor blades. A two-seater, it was developed into the three/four-seat S-52-2. Neither model was very succesful.
The Sikorsky HO5S-1 (company model S-52) was a utility helicopter developed by Sikorsky Aircraft in 1950,
The Sikorsky S-52-1 was the first US helicopter with all-metal rotor blades. A two-seater, it was developed into the three/four-seat S-52-2. Neither model was very succesful.
The Sikorsky HO5S-1 (company model S-52) was a utility helicopter developed by Sikorsky Aircraft in 1950, used by the U.S. Navy, Marines, and Coast Guard (as the HO5S-1G).[1]
Contents |
[edit] Design and development
[edit] Text 1
Sikorsky's long and eventful partnership with Army aviation can accurately be said to have started during the Second World War when the company's XR-4, the first helicopter built for military service, was delivered to the USAAC. Two other Sikorsky designs, the R-5 and R-6, also entered Army Air Force service before VJ Day, and all three types made important contributions both to the American war effort and to the development of military rotary-wing doctrine. However, it is the H-18 that holds the distinction of being the first Sikorsky helicopter to be procured for service evaluation by the Army Ground Forces, as distinct from the USAAF.
Design work on the Sikorsky Model S-52 began in late 1945, and the craft made its first flight in the summer of the following year. The first American helicopter to be equipped with all-metal main and anti-torque rotor blades, the S-52 had a semi-monocoque, pod-and-boom type fuselage, a single 175hp Franklin engine, quadricycle wheeled landing gear, and a fully-enclosed cabin that could seat up to three people. The machine's performance was quite impressive by the standards of the day; indeed, the commercial S-52 set three international speed and altitude records in 1948.
The S-52's performance was certainly a factor in the Army's 1949 decision to purchase four examples of the slightly modified Model S-52-2 for service test and evaluation.
S.Harding "U.S.Army Aircraft since 1947", 1990
[edit] Text 2
The first US helicopter with all-metal rotor blades, the Sikorsky S-52-1 two-seater was first flown on 12 February 1947, powered by a 133kW Franklin engine. In 1948 it established three international helicopter records for speed and altitude and was developed into the S-52-2, a three/four-seater with a 183kW Franklin O-425-1 engine which was ordered by the US Marine Corps as a replacement for the HO3S.
D.Donald "The Complete Encyclopedia of World Aircraft", 1997
[edit] Text 3
The S-52's performance was certainly a factor in the Army's 1949 decision to purchase four examples of the slightly modified Model S-52-2 for service test and evaluation. The Army's four YH-18As (serials 49-2888 through -2891) were essentially similar to the standard commercial S-52, differing primarily in their ability to carry a fourth passenger. Extensive testing showed the YH-18A to be quite capable in the light utility and observation roles, but the Army ultimately decided not to procure the type in quantity. One aircraft was later converted into the sole H-39 turbine-powered research helicopter and the S-52-2 eventually served the Navy, Marine Corps and Coast Guard as the HO5S.
S.Harding "U.S.Army Aircraft since 1947", 1990
[edit] Text 4
The first US helicopter with all-metal rotor blades, the Sikorsky S-52-1 two-seater was first flown on 12 February 1947, powered by a 133kW Franklin engine. In 1948 it established three international helicopter records for speed and altitude and was developed into the S-52-2, a three/four-seater with a 183kW Franklin O-425-1 engine which was ordered by the US Marine Corps as a replacement for the ÍO3S. Deliveries of the HO5S-1 began in March 1952, and the type served also with the US Coast Guard as the HO5S-1G.
D.Donald "The Complete Encyclopedia of World Aircraft", 1997
[edit] Variants
- YH-19
[edit] Operators
[edit] Specifications (H-19)
General characteristics
- Crew: 2 (pilot, copilot)
- Capacity: 12 troops or 8 litters
- Length: 62 ft 7 in (19.1 m)
- Rotor diameter: 53 ft (16.16 m)
- Height: 13 ft 4 in (4.07 m)
- Disc area: ft² (m²)
- Empty weight: 4,795 lb (2,177 kg)
- Loaded weight: 7,200 lb (3,266 kg)
- Max takeoff weight: 7,900 lb (3,587 kg)
- Powerplant: 1× Pratt & Whitney R-1340-57 radial engine, 600 hp (450 kW)
Performance
- Maximum speed: 101 mph (163 km/h)
- Range: 405 mi (652 km)
- Service ceiling 10,500 ft (3,200 m)
- Rate of climb: 700 ft/min (213 m/min)
[edit] References
- ^ Donald, David, ed. Encyclopedia of World Aircraft, (Etobicoke, Ontario: Prospero Books, 1997), p. 840, "Sikorsky S-52".
[edit] External links
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Category:Military helicopters Category:Korean War aircraft H-19, Sikorsky Category:United States Coast Guard Aviation
