Performance test of DH-4 with 400 H.P. Liberty "12" engine, equipped as two-seater corps observation airplane (performance test report no. 57)
United States. Army. Air Service. Engineering Division.
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DescriptionThis document describes the DH-4 observation airplane and gives the results of flight performance tests, including observations made by the test pilots related to taxiing, take-off, landing, balance, maneuverability, accessibility, and adaptability. Also included are images showing the biplane from three different angles.
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