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The Sikorsky S-76 is a medium-size commercial utility helicopter designed and produced by the American helicopter manufacturer Sikorsky Aircraft. It is the company's first helicopter specifically developed for the civilian market. The S-76 was developed during the mid-1970s, originally being designated S-74 but renamed in honor of the U.S ...
The S.76 uses a 4-cylinder engine, with a displacement of 28,353 cm 3 (1,730.2 in 3) (190 mm × 250 mm)(7.48in x 9.84in), providing 290 metric horsepower (210 kW) at 1400 rpm, 4 valves (3 valves the airship engine) starting with trembler coil, 2 spark plugs per cylinder (3 spark plug the aeroship engine), ignition with high voltage magneto BOSCH type DR4/4, and water cooling.
This is the case on many large aircraft such as the 747, C-17, KC-10, etc. If you are on an aircraft and you hear the engines increasing in power after landing, it is usually because the thrust reversers are deployed. The engines are not actually spinning in reverse, as the term may lead you to believe.
The Pratt & Whitney T73 (company designation JFTD12) is a turboshaft engine. [2] Based on the JT12A, the T73 powered the Sikorsky CH-54 Tarhe and its civil counterpart Sikorsky S-64 Skycrane flying crane heavy-lift helicopters. [3] Turboshaft versions for naval use are known as the FT12.
Jacobs engines were fitted to many US-built aircraft of the inter-war period, including several Waco models. They were in use in 26 different countries including in Canada, where 330 horsepower L6-MB engines were used to power the Royal Canadian Air Force's Avro Anson Mk. II aircraft. [8]
The S-75 mated an entirely new composite airframe with the twin turboshaft engines, transmission, and main and tail rotors of Sikorsky's S-76A civil transport helicopter. [1] The S-75's floors, roof and most exterior surfaces were of more ballistically-resistant Kevlar , while most of the aircraft's basic load-bearing structure was built of ...
In most aircraft installations the PT6 is mounted so that the intake end of the engine is towards the rear of the aircraft, leading to it being known by many as the "back-to-front" engine. [4] This places the power section at the front of the nacelle, where it can drive the propeller directly without the need for a long shaft.
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