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20,921 reviews
Excellent
20,921 reviews
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NACA P-51D Airplane Research Memorandum for the Air Material Command, Army Air Forces Flight Measurements of the Directional Stability nd Control of a P-51D Airplane with a Horn-Balanced Rudder as Compared with Previously Tested Vertical-Tail Configurations RM No. L6J25 has 30 pages Cover dated December 3, 1946.