Sikorsky HH-52 Seaguard
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|A U.S. Coast Guard HH-52A Seaguard using a rescue basket|
|Primary user||United States Coast Guard|
The Sikorsky HH-52 Seaguard (company designation S-62) was a single turbine engine, three-blade rotor amphibious helicopter. Originally developed as a commercial venture by the Sikorsky Aircraft Corporation of Stratford, Connecticut, it was used by the United States Coast Guard primarily for air-sea rescue. The HH-52 has been replaced by non-amphibious types such as the HH-65 Dolphin, which rely solely on the use of a winch from a low hover to conduct rescue operations.
Design and development
A number of S-62s were bought by the US Navy Bureau of Aeronautics for the US Coast Guard for use as a search and rescue helicopter. Initially designated HU2S-1G Seaguard, it was re-designated as the HH-52A Seaguard in 1962.
The HH-52A used a boat hulled shaped fuselage, smaller but similar to the US Navy's SH-3 (Sikorsky S-61), and was employed aboard the larger Coast Guard cutters and icebreakers. The S-62 used a single 1,250 hp (930 kW) General Electric T58-GE-8B turboshaft engine, a derated version of the T58-GE-10 powerplant used on the larger twin-engined SH-3; and a 1,050 hp T58-GE-6 derated to 670 hp, moving the same main and tail rotor as S-55 Model, in the prototype.
The turbine powered S-62 could carry more weight and fly faster than the H-19 (S-55). The aircraft was first conceived and designed to be amphibious so that flotation gear would not be required for over water flights, and rescues could be made by landing on the water. The fuselage is watertight for landings on water or snow. Two outrigger floats resist pitching and rolling on the water. Although the HH-52A looks very different from the Sikorsky H-19, it used many of the same components.
- Prototype. First flew on the 22nd of May 1958.
- Amphibious transport helicopter, powered by a General Electric CT58-110-1 turboshaft engine, with accommodation for up to 11 passengers. The S-62A was the first production version.
- One S-62 was fitted with the main rotor system of the S-58.
- Company designation of the HH-52A Seaguard.
- Produced under license in Japan by Mitsubishi.
- Original designation of the HH-52A Seaguard. Redesignated HH-52A in 1962.
- HH-52A Seaguard
- Search and rescue helicopter for the United States Coast Guard. 99 built including one transferred to Iceland.
- N880 - S-62 prototype, cn 62001, YoM 1958, ff 22-5-1958 - still in current FAA Register at March 31, 2011 to CARSON SERVICES Inc., Perkasie (PENNS.).
- USCG 1355 - On display at the National Naval Aviation Museum at NAS Pensacola, Florida
- USCG 1357 - Dillingham Airport, HI
- USCG 1370 - On display at Freedom Park in Omaha, Nebraska
- USCG 1375 - In storage at Yanks Air Museum in Chino, California.
- USCG 1378 - At the USS Alabama Museum in Mobile, Alabama 
- USCG 1383 - American Helicopter Museum & Education Center, Westchester, PA 
- USCG 1384 - Gate guard at CGAS Elizabeth City, NC
- USCG 1389 - Delgado Community College, New Orleans LA
- USCG 1394 - Mid-Atlantic Air Museum, Reading PA 
- USCG 1398 - In a mechanics school in Pocahantas AR
- USCG 1397 - Amarillo College, FAR Part 147 Aviation Maintenance Technician School, Amarillo, TX
- USCG 1415 - Museum of Flight (Seattle) Restoration Facility, Everett, WA 
- USCG 1416 - Broward College Aviation school - North Perry Airport, Pembroke Pines, FL
- USCG 1423 - Cockpit section only at National Museum of Naval Aviation at NAS Pensacola, Florida
- USCG 1426 - Will be going on display at the Steven F. Udvar-Hazy Center in Chantilly, Virginia on April 14, 2016.
- USCG 1428 - On display at the New England Air Museum, Windsor Locks, CT 
- USCG 1429 - Intrepid Sea, Air & Space Museum - New York City
- USCG 1450 - On display at the Pima Air & Space Museum adjacent to Davis-Monthan AFB in Tucson, Arizona
- USCG 1455 - On display at the Aviation Hall of Fame and Museum of New Jersey, Teterboro, NJ
- USCG 1459 - Sister to USCG 1394 above, both retired from the now closed USCG Air Station Chicago at NAS Glenview. Was on display at the Museum of Science and Industry (Chicago), now is at the Naval Air Station Glenview Museum.
- USCG 1462 - On display at the Naval Air Station Wildwood Aviation Museum, Cape May County, NJ 
- USCG 1466 - On display at the Selfridge Military Air Museum, Selfridge ANGB, Harrison Twp, MI 
- 62018 (cn M62002) - On display at the Philippine Air Force Museum, Ninoy Aquino International Airport, Pasay City
Data from Jane's All The World's Aircraft 1969-70 
- Crew: 3
- Length: 44 ft 6½ in (13.58 m)
- Rotor diameter: 53 ft 0 in (16.16 m)
- Height: 16 ft 0 in (4.88 m)
- Disc area: 2,206 sq ft (205 m²)
- Empty weight: 5,083 lb  (2,306 kg)
- Useful load: 3,217 lb  (1,459 kg)
- Max. takeoff weight: 8,300 lb  (3,764 kg)
- Powerplant: 1 × General Electric T58-GE-8 turboshaft, 1250 shp derated to 730 shp (500 kW)
- Maximum speed: 95 knot (175km/h, 109 mph) at sea level
- Cruise speed: 85 knot (158 km/h, 98 mph)
- Range: 412 nmi (763 km, 474 mi)
- Service ceiling: 11,200 ft (3,410 m)
- Rate of climb: 1,080 ft/min (5.5 m/s)
- Related development
- Related lists
- "Icelandic Coast Guard Service". aeroflight.co.uk. Retrieved 26 February 2013.
- "World Helicopter Market 1968 pg 53". Retrieved 2013-02-25.
- "JSDAF S-62". Demand media. Retrieved 26 February 2013.
- Japan Coast Guard: Aircraft Data File | J-HangarSpace: Information on Japanese Aviation
- "World Helicopter Market 1968 pg. 54". flightglobal.com. Retrieved 26 February 2013.
- "Phil Air Force S-62". Demand media. Retrieved 26 February 2013.
- Endres 1979, p. 12.
- "World Helicopter Market 1968 pg. 55". flightglobal.com. Retrieved 26 February 2013.
- "Sikorsky HH-52A Seaguard" (PDF). uscg.mil. Retrieved 24 February 2013.
- "S-62 (HH-52A, S-62A, S-62B, S-62C)". sikorskyarchives.com. Retrieved 26 February 2013.
- "SFO-Helicopter Airlines". Demand media. Retrieved 26 February 2013.
- "Aircraft on Display"National Naval Aviation Museum. Retrieved: 18 August 2012.
- Sikorsky S-62A Seaguard (HH-52A) Yanks Air Museum. Retrieved: 8 April 2016.
- "Aircraft Collection"USS ALABAMA BATTLESHIP. Retrieved: 18 August 2012.
- "Lis of Aircraft"American Helicopter Museum & Education Center. Retrieved: 18 August 2012.
- "Sikorsky HH-52A Seaguard" Mid-Atlantic Air Museum. Retrieved: 18 August 2012.
- "The Museum of Flight. Retrieved: 18 August 2012.
- "The story of the helicopter that saved 22 sailors from burning ships was forgotten. Until now." The Washington Post. Retrieved: 4 March 2016.
- Connor, Roger (14 March 2016). "Celebrating the Centennial of Coast Guard Aviation with the Seaguard". National Air and Space Museum. Retrieved 13 April 2016.
- "Phoenix Project". Coast Guard Aviation Association. Coast Guard Aviation Association. Retrieved 13 April 2016.
- "Sikorsky HH-52A (S-62A) 'Seaguard'"The New England Air Museum. Retrieved: 18 August 2012.
- "Sikorsky HH-52A Seaguard"Pima Air & Space Museum. Retrieved: 18 August 2012.
- "HH-52 Helicopter"Naval Air Station Wildwood Aviation Museum. Retrieved: 18 August 2012.
- Taylor 1969, pp. 434–434.
- Sikorsky Preflight Reference Cards
- Endres, Günter G. World Airline Fleets 1979. Hounslow, UK: Airline Publications and Sales Ltd., 1979, ISBN 0-905117-53-0.
- Taylor, John W. R.. Jane's All The World's Aircraft 1969-70. London:Jane's Yearbooks, 1969.
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