A flight test program was conducted to measure experimentally the roll control and spiral stability characteristics of two general aviation airplanes and to relate these characteristics to the increase in pilot's workload associated with preserving a level wing attitude during steep landing approaches. A DeHavilland Beaver DHC-2 airplane and a Beechcraft T-34B airplane were used in the investigation. Values of measured roll control and stability parameters are compared with current handling qualities criteria. Rates of roll are compared with values calculated using lifting-line theory. The experimental results show that the problem of reducing the pilot's workload is not dependent upon improving the roll control characteristics of the airplanes tested, but appears to be mostly dependent upon providing additional spiral stability and reducing cross coupling. The requirement for additional spiral stability needed during the landing approach conflicts with the need for neutral spiral stability during the turning maneuver. Comparisons of roll control parameters with current handling qualities criteria show that both airplanes are within the range for satisfactory operation. (Author)
Handling Characteristics in Roll of Two Light Airplanes for Steep Approach Landings
1972
9 pages
Report
No indication
English
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