PRELIMINARY DESIGN STUDY HOT CYCLE RESEARCH AIRCRAFT
HUGHES TOOL CO CULVER CITY CA
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A preliminary design study has been completed of a twin-engine hot cycle research helicopter utilizing the existing rotor with the following design objectives 1 15,300 lb design gross weight 2 25,500 lb alternate heavy-lift hovering gross weight 3 145 kt at a gross weight of 15,300 lb, helicopter mode and 4 197 knots at a gross weight of 10,000 lb auto gyro mode. Major design areas covered in the study include the rotor modifications, airframe, engine installation, engine controls, flight controls, diverter valves, blade duct valves, flight instrumentation, electrical system, hydraulic system, and fuel system.