Army Preliminary Evaluation 1 and Research and Development Acceptance Test 1, AH-56A Cheyenne Compound Helicopter
Final rept. 30 Jan-23 Dec 1971
ARMY AVIATION SYSTEMS TEST ACTIVITY EDWARDS AFB CA
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The Army Preliminary Evaluation I and a portion of the Reserach and Development Acceptance Test I were conducted periodically on the AH-56A Cheyenne compound helicopter. Primary test objectives were to gather stability and control data to provide an early assessment of the AH-56A, to assist in determining flight envelopes for future Army tests, and to examine previously identified problem areas. The capability of the pusher propeller to provide rapid deceleration and to control airspeed independently of dive angle is an excellent feature. Five deficiencies and 54 shortcomings were identified. Correction of the deficiencies should be a prerequisite for an airworthiness release for operational Army aviators, and correction of the shortcomings is desirable. Further testing of the AH-56A is recommended.