The purpose of this program was to conduct an analysis of helicopter power transfer systems (pts), both conventional and advanced concept type, with the objective of reducing specific weights and improving reliability beyond present values. The analysis satisfied requirements specified for a 200,000 pound cargo transport helicopter (CTH), a 70,000 pound heavy assault helicopter, and a 15,000 pound non-combat search and rescue helicopter. Four selected gearing systems (out of seven studied), optimized for lightest weight and equal reliability for the CTH, using component proportioning via stress and stiffness equations, had no significant difference between their aircraft payloads. All optimized pts were approximately 70% of statistically predicted weight. Reliability increase is predicted via gearbox derating using Weibull relationships. Among advanced concepts, the Turbine Integrated Geared Rotor was competitive for weight, technology availability and reliability increase but handicapped by a special engine requirement. The warm cycle system was found not competitive. Helicopter parametric weight analysis is shown. Advanced development Plans are presented for the pts for the CTH, including total pts system, selected pts components, and scale model flight testing in a Kaman HH2 helicopter.
Power Transfer Systems for Future Navy Helicopters
1972
252 pages
Report
Keine Angabe
Englisch
Aircraft , Jet & Gas Turbine Engines , Helicopter rotors , Helicopter engines , Gears , Reduction gears , Transmission gears , Reliability , Weight , Gas generating systems , Exhaust gases , Turbofan engines , Bleed systems , Rotor blades(Rotary wings) , Jet helicopter rotors , Power , Fuel consumption , Payload , Cargo , Tail helicopter rotors , Aerodynamic characteristics , Duct inlets , Blade airfoils , Advanced weapons , Naval aircraft , Analysis of variance , Fuselages , Design , Helicopters , Hh-2 aircraft , Hot cycle propulsion systems , H-2 aircraft , Partial entry turbines , Power transfer systems , Turbine integrated geared rotors , Shafts(Machine elements) , Turbojet engines , Warm cycle propulsion systems
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