Two prototypes of the AH-64 pilot seat cushions were evaluated against the standard cushion set by each of a group of 12 AH-64 instructor pilots after being exposed to simulated AH-64 vibration signatures for a period of 1 hour. Objective indications of vibration attenuation were obtained by measuring transfer functions across each cushion. Subjective pilot preferences also were obtained after each ride using a questionnaire. Results of the objective measurements indicate both the air-filled and the foam-filled prototypes reduced low-frequency transmission of vibration better than the standard cushions. Subjective responses indicate significant improvement in comfort and vibration absorption for the seat back and bottom cushions of both prototypes over the standard cushion set. Seat cushion, Apache, Helicopter pilots, Crew comfort.


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