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Doetsch, K.-H. (author), Gould, D.G. (author), McGregor, D.M. (author)This report is based on NRC, NAE LTR-FR-12, 1969 which was prepared for the United States Air Force by the Flight Research Section, National Aeronautical Establishment, National Research Council of Canada, Ottawa, under the sponsorship of the Air Force Flight Dynamics Laboratory, Research and Technology Division, Air Force Systems Command,...report 1971
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McGregor, D.M. (author)A particular STOL aircraft (the De Havilland of Canada, "Otter") was simulated using a variable stability helicopter to assess the simulator's capabilities in duplicating the flight characteristics of this class of aircraft. Direct comparisons were made by the pilots through alternate flights in the simulator and on the actual aircraft, and they...report 1969
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McGregor, D.M. (author)A flight investigation of various stability augmentation systems for the Hawker - Siddeley P1127 jet-lift V/STOL aircraft, using a variabie stability helicopter, is reported. The main emphasis was placed on overcoming the directional divergence due to the unstable weathercock stability that occurs at low airspeeds , but short investigations of a...report 1968
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McGregor, D.M. (author)A flight research programme was undertaken to determine control power and control sensitivity requirements during a vi sual hovering and low speed approach task using a small variable stability helicopter, Minimum levels of directional control power for satisfactory handling qualities were found, while maximum values of control sensitivity as...report 1966
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McGregor, D.M. (author)A simulatioA of the Canadair CL- 84 tilt-wing aircraft using an airborne V/STOL simulator is described. This programme was undertaken to assess the influence on the handling qualities of (i) backlash and flexibility in various locations in the control systems, and (ii) various realistic stability augmenta tion failures in the presence of these...report 1965
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McGregor, D.M. (author)An investigation ioto thc influence of dihedral effect on tbc directional angular rate dampings and contra! sensitivities required for bath nor mal and emergency operation was undertaken, using an airborne V/STOL simulator. The visual flight task performed by the pilots during the evaluation included hovering turns and a complete circuit...report 1964
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Daw, D.F. (author), Gould, D.G. (author), McGregor, D.M. (author)An investigation into the effects of various levels of weathercock stability on directional bandling qualities boundaries. defined in terms of angular rate damping versus control sensitivity. was undertaken using a V/STOL air borne simulator. The visual flight task performed by the pilots included hovering turns. in the presence of a sirnulated...report 1964
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McGregor, D.M. (author)Since many V/STOL aircraft being proposed, or under development, have potentially serious lateral-directional control cross-coupling effects, a handling qualities investigation was undertaken to determine the variation of pilots' opinion with these parameters. A visual flight task which included hovering, accelerating and decelerating...report 1963
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Daw, D. (author), McGregor, D.M. (author)To establish valid handling quality requirements for VTOL and STOL aireraft a need exiate for a simulator which adequately reproduces the dynamic responses and environment of the vehicle under consideration. To this end a variabie stabillity helicopter has been constructed in such a way that it is possible to vary many of the stability and...report 1962
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McGregor, D.M. (author)The turbulence encountered by a high speed aircraft flying at low level over the Laurentian Shield north of Ottawa, Ontario, during August, September and October, 1960, has been recorded by counting accelerometers. It was found that gust velocities of ± 10 ft. /sec. or greater occurred more frequently than was anticipated from the average of...report 1961