A research and development program for an improved Army AH-1S helicopter Structural Integrity Recording System (SIRS) was conducted to track fatigue damage accumulation on critical helicopter components. The work was divided into five tasks. Task I included modification of hardware and software of five SIRS recorders fabricated under a previous contract, recording of histogram data on flight conditions representative of current missions flown by AH-1S helicopters, determination of the tail rotor usage spectrum, and recording of flight parameters such as rotor RPM, engine torque, airspeed, altitude, acceleration, outside air temperature, gross weight, and pitch and roll attitude. Task II comprised all work required for installation of the SIRS recorders in AH-1S helicopters. Under Tasks III, IV, and V, installation of the flight recorders, monthly retrieval of data from the five aircraft, processing of data, and removal of the recorders and installation kits was performed. Recommendations for additional improvements on the recorder system and its utilization conclude this report. (Author)
Structural Integrity Recording System (SIRS) for U.S. Army AH-1S Helicopters
1981
250 pages
Report
Keine Angabe
Englisch
Recording Devices , Avionics , Monitors , Data acquisition , Attack helicopters , Tape recording , Structural members , Fatigue(Mechanics) , Aerodynamic loading , Mission profiles , Microprocessors , Onboard , Data processing equipment , Helicopter rotors , Hubs , Rotor blades(Rotary wings) , Flight recorders , Army aircraft , H-1 aircraft , AH-1S aircraft , SIRS(Structural Integrity Recording System) , Structural integrity
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