Sikorsky H-34 / S-58
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Sikorsky H-34 / S-58
Sikorsky H-34 / S-58 vu par Wikipedia.en
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The Sikorsky H-34 Choctaw (Company designation S-58) was a piston-engined military helicopter originally designed by [Vous devez être inscrit et connecté pour voir ce lien] aircraft manufacturer [Vous devez être inscrit et connecté pour voir ce lien] for the [Vous devez être inscrit et connecté pour voir ce lien] for service in the [Vous devez être inscrit et connecté pour voir ce lien] (ASW) role.
Sikorsky H-34s have since served mostly as medium transports on every continent with the armed forces of twenty-five countries — from combat in Algeria, the Dominican Republic, Nicaragua, and throughout Southeast Asia, to saving flood victims, recovering astronauts, fighting fires, and carrying presidents.
As 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, it would see a remarkably long run of 2,108 H-34s produced between 1953 and 1970.
It would see extended use when adapted to turbine power as the Westland Wessex and the later S-58T.
The British did not retire the Wessex until[Vous devez être inscrit et connecté pour voir ce lien] as the main transport helicopter; it was replaced by the [Vous devez être inscrit et connecté pour voir ce lien].
[Vous devez être inscrit et connecté pour voir ce lien]
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The Sikorsky H-34 Choctaw (Company designation S-58) was a piston-engined military helicopter originally designed by [Vous devez être inscrit et connecté pour voir ce lien] aircraft manufacturer [Vous devez être inscrit et connecté pour voir ce lien] for the [Vous devez être inscrit et connecté pour voir ce lien] for service in the [Vous devez être inscrit et connecté pour voir ce lien] (ASW) role.
Sikorsky H-34s have since served mostly as medium transports on every continent with the armed forces of twenty-five countries — from combat in Algeria, the Dominican Republic, Nicaragua, and throughout Southeast Asia, to saving flood victims, recovering astronauts, fighting fires, and carrying presidents.
As 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, it would see a remarkably long run of 2,108 H-34s produced between 1953 and 1970.
It would see extended use when adapted to turbine power as the Westland Wessex and the later S-58T.
The British did not retire the Wessex until[Vous devez être inscrit et connecté pour voir ce lien] as the main transport helicopter; it was replaced by the [Vous devez être inscrit et connecté pour voir ce lien].
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Re: Sikorsky H-34 / S-58
Development
The Sikorsky S-58 was developed as essentially a lengthened and more powerful version of the Sikorsky (model S-55) or [Vous devez être inscrit et connecté pour voir ce lien], with a similar nose, but with a tail-dragger rear fuselage and landing gear rather than the high-tail 4 post pattern.
It retained the nose-mounted piston engine with the drive shaft passing the cockpit placed high above the cargo compartment.
Pilots of H-34s in Vietnam service would later discover that some of the design's distinctive features carried penalties.
The high cockpit made it an obvious target, and the drive shaft created a partition that made it difficult for crew chiefs to come to the aid of the cockpit crew if they became injured.
The H-34's magnesium skin resulted in very intense fires, and contributed to significant corrosion problems.
The airframe was also too weak to support most of the weapon systems that allowed the UH-1s to become an effective ad-hoc gunship. Nonetheless, the H-34 demonstrated an ability to sustain a substantial amount of combat damage and still return home.
The Sikorsky S-58 was developed as essentially a lengthened and more powerful version of the Sikorsky (model S-55) or [Vous devez être inscrit et connecté pour voir ce lien], with a similar nose, but with a tail-dragger rear fuselage and landing gear rather than the high-tail 4 post pattern.
It retained the nose-mounted piston engine with the drive shaft passing the cockpit placed high above the cargo compartment.
Pilots of H-34s in Vietnam service would later discover that some of the design's distinctive features carried penalties.
The high cockpit made it an obvious target, and the drive shaft created a partition that made it difficult for crew chiefs to come to the aid of the cockpit crew if they became injured.
The H-34's magnesium skin resulted in very intense fires, and contributed to significant corrosion problems.
The airframe was also too weak to support most of the weapon systems that allowed the UH-1s to become an effective ad-hoc gunship. Nonetheless, the H-34 demonstrated an ability to sustain a substantial amount of combat damage and still return home.
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Re: Sikorsky H-34 / S-58
The aircraft first flew on 8 March 1954.
The first production aircraft was ready in September and entered in service for the [Vous devez être inscrit et connecté pour voir ce lien] initially designated HSS-1 Seabat (in its anti-submarine configuration) and HUS-1 Seahorse (in its utility transport configuration) under the U.S. Navy designation system for U.S. Navy, [Vous devez être inscrit et connecté pour voir ce lien] (USMC) and [Vous devez être inscrit et connecté pour voir ce lien] (USCG) aircraft.
The U.S. Army and Marine Corps, respectively, ordered it in 1955 and 1957. Under the [Vous devez être inscrit et connecté pour voir ce lien]'s aircraft designation system, also used by the [Vous devez être inscrit et connecté pour voir ce lien], the helicopter was designated H-34.
The U.S. Army also applied the name Choctaw to the helicopter.
In 1962, under the new unified DoD aircraft designation system, the Seabat was redesignated SH-34, the Seahorse as the UH-34, and the Choctaw as the CH-34.
The first production aircraft was ready in September and entered in service for the [Vous devez être inscrit et connecté pour voir ce lien] initially designated HSS-1 Seabat (in its anti-submarine configuration) and HUS-1 Seahorse (in its utility transport configuration) under the U.S. Navy designation system for U.S. Navy, [Vous devez être inscrit et connecté pour voir ce lien] (USMC) and [Vous devez être inscrit et connecté pour voir ce lien] (USCG) aircraft.
The U.S. Army and Marine Corps, respectively, ordered it in 1955 and 1957. Under the [Vous devez être inscrit et connecté pour voir ce lien]'s aircraft designation system, also used by the [Vous devez être inscrit et connecté pour voir ce lien], the helicopter was designated H-34.
The U.S. Army also applied the name Choctaw to the helicopter.
In 1962, under the new unified DoD aircraft designation system, the Seabat was redesignated SH-34, the Seahorse as the UH-34, and the Choctaw as the CH-34.
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Re: Sikorsky H-34 / S-58
Roles included utility transport, anti-submarine warfare, search and rescue, and VIP transport.
In it standard configuration transport versions could carry 12 to 16 troops, or eight [Vous devez être inscrit et connecté pour voir ce lien] cases if utilized in the [Vous devez être inscrit et connecté pour voir ce lien] role, while VIP transports carried significantly fewer people in significantly greater comfort.
A total of 135 H-34s were built in the U.S. and assembled by [Vous devez être inscrit et connecté pour voir ce lien] in France, 166 were produced under licence in France by Sud-Aviation for the French Air Force, Navy and Army Aviation (ALAT).
The CH-34 was also built and developed under license from 1958 in the [Vous devez être inscrit et connecté pour voir ce lien] by [Vous devez être inscrit et connecté pour voir ce lien] as the turbine engined [Vous devez être inscrit et connecté pour voir ce lien] which was used by the [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien].
The RN Wessex was fitted out with weapons and ASW equipment for use in an antisubmarine role.
The RAF used the Wessex, with turboshaft engines, as an air/sea rescue helicopter and as troop transporter.
Wessexes were also exported to other countries and produced for civilian use.
In it standard configuration transport versions could carry 12 to 16 troops, or eight [Vous devez être inscrit et connecté pour voir ce lien] cases if utilized in the [Vous devez être inscrit et connecté pour voir ce lien] role, while VIP transports carried significantly fewer people in significantly greater comfort.
A total of 135 H-34s were built in the U.S. and assembled by [Vous devez être inscrit et connecté pour voir ce lien] in France, 166 were produced under licence in France by Sud-Aviation for the French Air Force, Navy and Army Aviation (ALAT).
The CH-34 was also built and developed under license from 1958 in the [Vous devez être inscrit et connecté pour voir ce lien] by [Vous devez être inscrit et connecté pour voir ce lien] as the turbine engined [Vous devez être inscrit et connecté pour voir ce lien] which was used by the [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien].
The RN Wessex was fitted out with weapons and ASW equipment for use in an antisubmarine role.
The RAF used the Wessex, with turboshaft engines, as an air/sea rescue helicopter and as troop transporter.
Wessexes were also exported to other countries and produced for civilian use.
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Re: Sikorsky H-34 / S-58
Two U.S. Marine Corps helicopters from Marine Corps Air Station, Tustin, California (USA) in flight in 1964.
A Sikorsky CH-37C Mojave from Marine heavy helicopter squadron HMH-462 leads a Sikorsky UH-34D Seahorse helicopter from Marine medium helicopter squadron HMM-363.
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A Sikorsky CH-37C Mojave from Marine heavy helicopter squadron HMH-462 leads a Sikorsky UH-34D Seahorse helicopter from Marine medium helicopter squadron HMM-363.
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