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Lockheed
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 | |
