The Effects of Parameter Variation on Helicopter Performance.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Six different cases of helicopter main rotor parameter variation are considered for each of three different forward velocities - hover, sixty knots and one-hundred fifty knots - in order to consider the effects of the changes on the total power required for the helicopter. The six cases included variations in rotor radius, rotor chord, solidity disc area, rotational velocity and tip velocity. Although strong positive or negative effects may be observed at some velocities, these trends are generally not the same at all velocities, indicating that trade-offs must be made in the design process in order to optimize the level flight performance. Theses
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