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A Method of Flight Measurement of Spins (1932)
NASA Technical Reports Server (NTRS) · leaf 7
REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS … Figure 2.—Altimeter, control switches, and control-position-recorder in pilot's cockpitNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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