Accession Number : ADP005979

Title :   Investigation of Vertical Axis Handling Qualities for Helicopter Hover and Noe Flight,

Corporate Author : NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO) FLIGHT RESEARCH LAB

Personal Author(s) : Baillie, S. W. ; Morgan, J. M.

Report Date : JUN 1987

Pagination or Media Count : 9

Abstract : The preliminary results of two in-flight simulation programs on vertical axis rotorcraft handling qualities are presented. The parameters investigated in these studies were heave damping, Zw thrust to weight ratio, T/W, and a number of dynamic engine governor/rotor system models. Flight tasks included hover, hover manoeuvering and nap of the earth (NOE) flight. Evaluation of 9 heave damping, thrust to weight ratio configurations provides that basis to suggest Level 1 Zw and T/W boundary values of -0.20 sec. and 1.08 respectively. These boundaries are compared with other relevant work on the topic. The engine governor/rotor system evaluation results tend to disagree with handling qualities predictions based on a vertical velocity shaping parameter however further investigation is required. NATO.

Descriptors :   *FLIGHT SIMULATION, *HELICOPTERS, *HOVERING, BOUNDARIES, CONFIGURATIONS, DAMPING, HANDLING, HEAVING, INFLIGHT, NATO, ROTARY WING AIRCRAFT, PARAMETERS, PREDICTIONS, QUALITY, RATIOS, SHAPE, SIMULATION, THRUST, VALUE, VELOCITY, VERTICAL ORIENTATION, WEIGHT, HELICOPTER ENGINES, HELICOPTER ROTORS.

Subject Categories : Flight Control and Instrumentation
      Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE