Searching in stories... |
Timeline |
Options
|
|
||
|
||
|
||
Show the latest entries |
||
Searching in stories... |
Timeline |
The Sikorsky H-34 Choctaw (company designation S-58) is a piston-engined military helicopter that was originally designed by American aircraft manufacturer Sikorsky for the United States Navy for service in the anti-submarine warfare (ASW) role. 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.
Various H-34s 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, in roles such as 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.
The Sikorsky S-58 was developed as a lengthened and more powerful version of the Sikorsky (model S-55) or UH-19 Chickasaw, 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 through the cockpit placed high above the cargo compartment.
The aircraft first flew on 8 March 1954. The first production aircraft was ready in September and entered in service for the United States Navy 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, United States Marine Corps (USMC) and United States Coast Guard (USCG) aircraft. The U.S. Army and Marine Corps, respectively, ordered it in 1955 and 1957. Under the United States Army's aircraft designation system, also used by the United States Air Force, 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.
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 stretcher cases if utilized in the MedEvac 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 Sud-Aviation 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 United Kingdom by Westland Aircraft as the turbine engined Wessex which was used by the Royal Navy and Royal Air Force. 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.
French evaluations on the reported ground fire vulnerabilities of the CH-34 may have influenced the U.S. Army's decision to deploy the CH-21 Shawnee to Vietnam instead of the CH-34, pending the introduction into widespread service of the Bell UH-1 Iroquois. U.S. Army H-34s did not participate in Vietnam, and did not fly in the assault helicopter role, however a quantity were supplied to the Army of the Republic of Vietnam. These saw little use due to a lack of spare parts and maintenance.
Its higher availability and reliability due to its simplicity compared to the newer helicopters led Marines to ask for it by name. The phrases "give me a HUS", "get me a HUS" and "cut me a HUS" entered the U.S. Marine Corps vernacular, being used even after the type was no longer in use to mean "help me out".
USMC H-34s were also among the first gunship helicopters trialled in theatre, being fitted with the Temporary Kit-1 (TK-1), comprising two M60C machine guns and two 19-shot 2.75 inch rocket pods. The operations were met with mixed enthusiasm, and the armed H-34s, known as "Stingers" were quickly phased out. The TK-1 kit would form the basis of the TK-2 kit used on the UH-1E helicopters of the USMC.
The H-34 remained in service with United States Army and Marine Corps aviation units well into the late 1960s, and was standard equipment in Marine Corps Reserve, Army Reserve and Army National Guard aviation units until replaced by the UH-1 Iroquois utility helicopter. Sikorsky production ceased in 1968, with 1,821 built.[4] On 3 September 1973, the last flight of a USMC UH-34 occurred as Bureau Number 147191 was flown to MCAS New River. All H-34 helicopters were retired from service in the U.S. military by the early 1970s.
France bought 134 Choctaws in parts from the United States and assembled by Sud-Aviation. A further 166 were manufactured later locally for the French Army, Navy and Air force, these again produced by Sud-Aviation.
Westland Wessex - See below.
The H-34 was the primary VNAF helicopter until replaced by the Bell UH-1 Huey.
The S-58 flew combat missions after the end of the Six Days War, mainly against Palestinians infiltrating Israel or against their bases in Jordan. On 21 March 1968, they participated in the Battle of Karameh, bringing Israeli troops in and out as well as evacuating the wounded. This was the last operation of the S-58 as it was retired shortly later, replaced by the Bell 205 and Aérospatiale Super Frelon.
Civil S-58T powered by a Pratt & Whitney Canada PT6T Twin-Pac turbine power plant
27 July 1960 Chicago Helicopter Airways Flight 698 a S-58C registered N879 crashed into Forest Home Cemetery, Forest Park, Illinois, United States with the loss of 11 passengers and two crew. The investigation concluded that the helicopter became uncontrollable as a result of structural disintegration in flight caused by a fatigue failure of the main rotor blade.
13 March 2011 Sikorsky S-58ET, N33602, suffered an engine failure, descended and veered off the side of an office building in El Segundo, California, while lifting an external load from the roof. The commercial pilot was seriously injured, the helicopter was substantially damaged and consumed by a post-impact fire. The helicopter was registered to Heli Flight, Inc., and operated by Aris Helicopters.
An American-built Sikorsky HSS-1 was shipped to Westland in 1956 to act as a pattern aircraft. It was re-engined with a Napier Gazelle turboshaft engine, and first flew in that configuration on 17 May 1957. The first Westland-built Wessex XL727, designated a Wessex HAS.1, first flew on 20 June 1958. The type first began performing anti-submarine duties in 1961, operated by the Royal Navy Fleet Air Arm.
As an anti-submarine helicopter, the Wessex could track targets but not engage them with either depth charges or torpedos as this was beyond its carrying capacity; this limitation led to Westand and the Royal Navy quickly seeking a helicopter that could provide that capability, resulting in the acquisition and adaption of another Sikorsky-designed aircraft to produce the Westland Sea King.
The Wessex helicopter was successfully adapted in the early 1960s as a general-purpose helicopter for the RAF, capable of performing troop-carrying, air ambulance and ground support roles. In contrast with the HAS.1, it used twin Rolls-Royce Gnome engines. These marks (HC.2, HCC.4, HU.5) had a single large exhaust on each side of the nose, the Gazelle-powered examples having a pair of smaller exhausts on either side.
The Wessex was first used by the Royal Navy, introducing the HAS.1 to meet the service's growing need to counter the expanding capabilities and numbers of submarines. The Navy would quickly press the development of the HAS.1 into the improved HAS.3, which came into service in 1967. It saw embarked service on the County class destroyers. The HAS.3 could be identified by a dorsal radome and strake extending behind the "hump".
The RAF became an operator of the Wessex in 1962; those helicopters used for air-sea or mountain rescue duties helped make the Wessex a particularly well known aircraft of the service and contributed to the saving of many lives during its time in service. As one of the RAF's standing duties, multiple Wessex helicopters were permanently kept on standby to respond to an emergency located anywhere within 40 miles of the British coastline within 15 minutes during daytime, at night hours this response time was decreased to 60 minutes. SAR-tasked Wessex helicopters were also stationed abroad, such as at Cyprus.
Wessex helicopters were also used by the Queen's Flight of the RAF to transport VIPs including members of the British Royal Family; in this role, the helicopters were designated HCC.4 and were essentially similar to the HC.2, differences included an upgraded interior, additional navigation equipment and enhanced maintenance programmes. Both Prince Philip and Prince Charles were trained Wessex pilots, occasionally they would perform as flying crew members in addition to being passengers on board the VIP services. The Wessex was replaced in this role by a privately leased Sikorsky S-76 in 1998.
In 1962, an international crisis arose as Indonesia threatened confrontation over the issue of Brunei, which was not in the newly formed Federation of Malaya. By February 1964, a large number of RAF and RN helicopters, including Westland Wessex, were operating from bases in Sarawak and Sabah to assist Army and Marine detachments fighting guerilla forces infiltrated by Indonesia over its one thousand mile frontier with Malaysia. Having removed much of the anti-submarine equipment to lighten the aircraft, during the Borneo Campaign the Wessex was operated as a large transport helicopter, capable of ferrying up to 16 troops or a 4,000 pound payload of supplies directly to the front lines. Alongside the Westland Scout, the Wessex emerged as one of the main workhorses of the campaign, roughly half were operated directly from land bases and would regularly rotate with those stationed on RN vessels stationed off shore.
Around 55 Westland Wessex HU.5s participated in the Falklands War, fighting in the South Atlantic in 1982. Their prime role was the landing, and moving forward, of Rapier missile systems, fuel, artillery and ammunition. On 21 May 1982, 845 Squadron's Wessex HU.5s supported British landings on East Falkland. The type was heavily used throughout the conflict for the transportation and insertion of British special forces, including members of the Special Air Service (SAS) and the Special Boat Service (SBS). A total of nine Wessex (eight HU.5s and one HAS.3) were lost during the Falklands campaign. Two HU.5s of 845 Squadron crashed on the Fortuna Glacier in South Georgia during an attempt to extricate members of the SAS, six of 848 Squadron's Wessex HU.5s were lost when the container ship Atlantic Conveyor was sunk and the HAS.3 aboard HMS Glamorgan (D19) was destroyed when the ship was struck by an Exocet missile.
In April 1961, the Royal Australian Navy (RAN) announced that they had selected the Westland Wessex to become the standard service helicopter from their ships and its intention to purchase roughly 30 for anti-submarine patrols, casualty evacuations, and fleet communications duties. The Wessex was a major operational shift for the Fleet Air Arm, enabling the RAN to proceed with the conversion of the aircraft carrier HMAS Melbourne as an anti-submarine platform. The RAN formally accepted the first two of 27 Wessex helicopters in September 1963; 817 Squadron was the first to operate the type.
By 1980, the Wessex was no longer being used for anti-submarine operations, instead performing the personnel transport mission as a utility helicopter instead.
— — — = = — — —
— — — = = — — —
You choosed to show only the famous things! (Via the Options menu)