A HELicopter Performance Evaluation (HELPE) computer model has been developed. The model is empirically based on the energy balance method. For a helicopter at a given mission, the model computes for a helicopter at given weight and flight conditions, the maximum possible level speed, its maneuverability in a turn, and its hover and climb capabilities in the in-ground and out-of-ground effects modes. The code also computes the speeds of maximum endurance in the air and of maximum range for the helicopter. Thrust, Induced drag, Profile drag, Tail rotor, Parasitic drag, Turn radius, Rate of turn, Vertical rate of climb, Maneuverability, Bank angle.


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