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Single-rotor helicopters need a mechanism to neutralize the yawing movement produced by the single large rotor. This is commonly accomplished by a tail rotor, coaxial rotors, and the NOTAR systems. Tandem-rotor helicopters, however, use counter-rotating rotors, with each cancelling out the other's torque.
This is a list of accidents and incidents involving the Westland Sea King helicopter, a British license-built and developed version of the American Sikorsky Sea King anti-submarine and utility helicopter, [1] As of 2012, Westland Sea Kings have been involved in forty-six significant accidents and incidents, involving forty-eight aircraft, during their service career.
Arizona Helicopters: United States 1970s [clarification needed] Asian Airlines: Kathmandu: Nepal 1993 Australian Helicopters: Australia Bajan Helicopters: Bridgetown: Barbados 1989 2009 Bond Air Services: Australia Bond Aviation Group: Staverton: United Kingdom 1961 2016 Bond Offshore Helicopters: Australia Boun Oum Airways: 1964 1967 Braathens ...
Intermeshing rotored helicopters have high stability and powerful lifting capability. The latest Kaman K-MAX model is a dedicated sky-crane design used for construction work, and has been modified for trials by the USMC as an optionally-unmanned cargo transporter. Unmanned aerial vehicles with intermeshing rotors have also been flown. [2]
It was the first light commercial twin-turbine helicopter developed in the United States. [ 4 ] The Bell 222 incorporated a number of advanced features, including dual hydraulic and electrical systems, sponsons housing the retractable landing gear , and the Noda Matic vibration reduction system developed for the Bell 214ST .
Petroleum Helicopters International, Inc. (PHI), is an American commercial helicopter operator, founded in 1949, by Robert L. Suggs. [2] The company is based in Lafayette, Louisiana and provides service for the oil and gas industry, aeromedical services, pilot training and aircraft maintenance. [3] [4]
The investigation determined that the helicopter lost yaw control due to failure of flight control computer. On 29 May 2001, a Republic of Korea Army (ROK Army) CH-47D installing a sculpture onto Olympic Bridge in Seoul, South Korea failed to unlatch the sculpture. The helicopter's rotors struck the monument; then the fuselage hit and broke ...
The Safari is a two-seat light helicopter with a bubble canopy, a two-bladed main rotor and a skid landing gear. The aircraft structure consists predominantly of welded 4130 chromoly steel tubing. The kit provides the main and tail rotors, rotor hubs, transmission, engine, cockpit and tailboom completed. Builder construction is largely assembly ...