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[[graph]] Absolute Ceiling 16500 ft Service Ceiling 147000 ft High Speed Time to Climb Rate of Climb Wittemann Aircraft Corp. {D.H. M2 D.H. 4-B} Conversion Performance Chart with 420 H.P. Liberty Motor [[y-axis]]Altitude - ft 5000 10000 15000 [[/y-axis]] [[x-axis]] 0 100 200 300 400 500 600 700 800 900 Rate of Climb-ft/min 0 10 20 30 40 50 Time to Climb - Min. 70 80 90 100 110 120 Speed - M.P.H. [[/x-axis]]