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A Bell UH-1 Iroquois helicopter. A helicopter is a powered rotorcraft with rotors driven by the engine(s) throughout the flight, allowing it to take off and land vertically, hover, and fly forward, backward, or laterally. Helicopters have several different configurations of one or more main rotors.
Huskies were usually capable of reaching crash sites before ground vehicles could, saving often-critical time in the rescue. [7] The helicopter had an especially strong down-wash that was useful in fighting fires. [8] During 1962, the USAF opted to change the H-43 designation to HH-43 to reflect the rotorcraft's role as a rescue vehicle.
A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more horizontally-spinning rotors. [8] By contrast the autogyro (or gyroplane) and gyrodyne have a free-spinning rotor for all or part of the flight envelope, relying on a separate thrust system to propel the craft forwards, so that the airflow sets the rotor ...
Several pieces of the Bell 206 helicopter's propulsion system were found scattered around the crash site, including the transmission, main rotor hub and blades. The safety board said one of the ...
Each type of helicopter has a specific airspeed at which a power-off glide is most efficient. The best airspeed is the one that combines the greatest glide range with the slowest rate of descent. The specific airspeed is different for each type of helicopter, yet certain factors (density altitude, wind) affect all configurations in the same manner.
3 July – A Pakistan Army Mil Mi-17 helicopter crashes in Khyber Pass, Pakistan, killing all 41 people on board. 8 August – A Eurocopter AS350 collides with a Piper PA-32R over the Hudson River between Hoboken, New Jersey and New York City, United States. The six occupants of the helicopter and the three occupants of the Piper aircraft all ...
De la Cierva designed a three-engined aircraft, but during an early test flight, the bomber stalled and crashed. De la Cierva was troubled by the stall phenomenon and vowed to develop an aircraft that could fly safely at low airspeeds. The result was the first successful rotorcraft, which he named autogiro in 1923. [14]
The Bell 407 is a four-blade, single-engine, civil utility helicopter. A derivative of the Bell 206L-4 LongRanger, the 407 uses the four-blade, soft-in-plane design rotor with composite hub developed for the United States Army's OH-58D Kiowa Warrior instead of the two-blade, semi-rigid, teetering rotor of the 206L-4.