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Lockheed AH-56A Cheyenne

The Lockheed C-840 (AH-56 Cheyenne) won the competition of the US Army’s AAFSS (Advanced Aerial Fire Support System) programme in 1965. Until 1968, 10 pre-production models were delivered and 375 orders were placed. But in the meantime the US Army had already acquired the Bell AH-G HueyCobra. When the Cobras were available in Vietnam in 1969, the order for the AH-56 Cheyenne was cancelled.

In order to accelerate the speed of that helicopter, an additional pusher propeller was built in.
Type Attack and attack support helicopter
First flight 21.09.1967
Crew 2

Specifications

Version   AH-56A Cheyenne
Dimensions
Overall length m  18,30
Overall height m 4,10
Fuselage length m  
Main rotor diameter m 15,36
Tail rotor diameter m  
Masses
Max. take-off mass kg 13600
Empty mass kg 5320
Powerplant
Turbines    1x  General Electric T64-GE-16
Turbine power KW 1x  3435 shp
Flight performance and limits
Max. speed km/h 408
Max. cruise speed km/h 370
Max. climb rate m/s 16,7
Max. range km 1400
Max. endurance h  
Hover ceiling (IGE) m  
Max. hover ceiling (OGE) m  

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