Some effects of tail height and wing plan form on the static longitudinal stability characteristics of a small-scale model at high subsonic speeds

Albert G. Few, Jr., Thomas J. King, Jr.
naca-tn-3957
May 1957


An investigation has been made in the Langley high-speed 7-by-10-foot tunnel to determine some effects of tail height and wing plan form on the static longitudinal stability characteristics of a complete, small-scale model at high subsonic speeds. The model had both a low-tail position (wing chord plane extended) and a high-tail position (65 percent semispan above the wing chord plane extended). The wings were 4 percent thick, had an aspect ratio of 3, and had various taper ratios and angles of sweep. Three wings had a taper ratio of 0.50 and quarter-chord sweep angles of 25, 30 and 35 degrees; whereas the fourth wing had 30 degrees of sweep and a taper ratio of 0.20. The Mach number range extended from about 0.80 to 0.94 with corresponding Reynolds numbers ranging from about 1.17 X 10-to-the-sixth to 1.29 X 10-to-the-sixth for average test conditions.

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