Sikorsky H-34 (S-58)

Sikorsky H-34 (S-58)
Kraju	Stany Zjednoczone Ameryki
Roli	Śmigłowiec wojskowy
Pierwszy lot	8 marca 1954 r.
Zbudowany	2108

Galeria zdjęć Sikorsky H-34 (S-58), The Sikorsky H-34 (company designation S-58) is a piston-engined military helicopter originally designed by American aircraft manufacturer Sikorsky as an anti-submarine warfare (ASW) aircraft for the United States Navy. It has seen extended use when adapted to turbine power by the British licensee as the Westland Wessex and Sikorsky as the later S-58T. H-34s served, mostly as medium transports, on every continent with the armed forces of twenty-five countries. It saw combat in Algeria, the Dominican Republic, Nicaragua, and throughout Southeast Asia; other uses included saving flood victims, recovering astronauts, fighting fires, and carrying presidents. It was one of the last piston-powered helicopter designs before its replacement by turbine-powered types such as the UH-1 Huey and CH-46 Sea Knight. A total of 2,108 H-34s were manufactured between 1953 and 1970

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Sikorsky H-34 (S-58)
Fotografów	Eugeny Dedigurov, Andriej Zinczuk
Lokalizacja	Niewiedzy
Zdjęcia	49

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Sikorski UH-34D Seahorse Walk Around
Fotograf	Władimir Yakubov
Lokalizacja	Muzeum Szerszeni USS
Zdjęcia	51

Sikorsky UH-34D Seahorse 01

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Sikorsky S-58 Walk Around
Fotograf	Unknow
Lokalizacja	Muzeum Militaire'a Luchtvaarta, Soesterberg
Zdjęcia	61

Sikorsky S-58

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The “Hump-Backed” Legend

Tthe Sikorski H-34 (company designation S-58) was one of the most successful and recognizable helicopters of the mid-20th century. Originally designed for the U.S. Navy as an anti-submarine warfare (ASW) platform, its incredible ruggedness and lifting capacity quickly made it a favorite for the U.S. Marines and Army. Known as the Seabat, Seahorselub Choctaw depending on the branch, it served as a vital bridge between the early experimental helicopters of the Korean War and the turbine-powered “Huey” era. It famously retrieved Mercury astronauts from the sea and pioneered air assault tactics that changed modern warfare forever.

Attribute	Technical Specification (UH-34D)
Roli	Military Utility / Transport / ASW
Załogi	2 Pilots + 1-2 Crew Chiefs/Gunners
First Flight	March 8, 1954
Zespół napędowy	1 × Wright R-1820-84 Cyclone radial engine
Horsepower	1,525 hp (1,137 kW)
Prędkość maksymalna	122 mph (196 km/h)
Ładunku	12–16 troops or 8 stretchers (2,300 kg / 5,000 lbs)
Main Rotor	4 blades; 56 ft (17.07 m) diameter

Design Engineering: The Nose-Engine Layout

The Angled Drive Shaft: To keep the main cabin clear for troops and cargo, Sikorsky placed the massive radial engine in the nose, tilted at a 45-degree angle. The drive shaft ran upward between the two pilots’ seats to the main rotor gearbox above the cabin. [Image diagram of the H-34 drive train showing the nose engine and angled shaft]
Clamshell Doors: Maintenance was simplified by two large “clamshell” doors at the very front. Mechanics could stand on the ground and have full access to the engine without needing specialized ladders or scaffolding.
High-Visibility Cockpit: Because the engine occupied the nose, the pilots sat very high up. This gave them an unparalleled view for landing in tight zones, though it also made them prominent targets for ground fire in combat.
Folding Tail and Blades: Designed for carrier use, the entire tail section (pylon) could be folded forward against the fuselage, and the main rotor blades could be stowed, drastically reducing its footprint on a ship’s hangar deck.

Combat and Global Service

The “Pirate” in Algeria: The French Air Force used the H-34 extensively during the Algerian War. They were among the first to arm them with 20mm cannons and machine guns, creating the “Pirate” gunship and developing the “Air Mobile” tactics later used in Vietnam.
The “Stinger” Gunships: In the early years of the Vietnam War, U.S. Marines fitted H-34s with the “TK-1” kit (M60 machine guns and 2.75-inch rockets). Known as “Stingers,” these were the predecessors to dedicated attack helicopters like the Cobra.
Astronaut Recovery: The H-34 was the primary recovery helicopter for NASA’s Project Mercury. It famously attempted to save Gus Grissom’s Liberty Bell 7 capsule before it sank, and successfully retrieved Alan Shepard and John Glenn.
The Turbine Evolution: The airframe was so good that the British licensed it as the Westland Wessex, replacing the piston engine with a turbine. This gave the aircraft a new “nose job” and decades of additional service life with the Royal Navy and RAF.