Den Klokke 47 er en enkelt rotor enkeltmotor let helikopter fremstillet af Bell Helicopter. Baseret på den tredje Bell 30 prototype, virksomhedens første helikopter designet af Arthur M. Young, blev 47 den første helikopter certificeret til civil brug den 8. marts 1946. Mere end 5.600 Bell 47'ere blev produceret, herunder dem under licens af Agusta i Italien, Kawasaki Heavy Industries i Japan og Westland Aircraft i Storbritannien. Bell 47J Ranger er en modificeret version med en fuldt lukket kabine og skrog.
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The Bell 47 is a single-engine two-seat light helicopter that was designed and produced by Bell Aircraft Corporation in the United States. It was the first mass-produced helicopter and the first to be certified for civilian use. The Bell 47 was widely used for various purposes, such as aerial photography, crop dusting, medical evacuation, military training, and police work. The Bell 47 was also featured in many films and television shows, such as MASH, Whirlybirds, and Magnum P.I. The Bell 47 has a distinctive bubble-shaped canopy that provides excellent visibility for the pilot and the passenger. The helicopter is powered by a Lycoming O-435 engine that drives a two-blade main rotor and a two-blade tail rotor. The Bell 47 has a maximum speed of 105 mph (169 km/h) and a range of 214 miles (344 km). The Bell 47 was introduced in 1946 and remained in production until 1974. More than 5,600 units were built and many are still flying today.