An Investigation of the Aerodynamic Characteristics of an Airplane Equipped with Several Different Sets of Wings (1929)
NASA Technical Reports Server (NTRS) · leaf 6
tions of the engine and flashed a light in a standard photographic type recording instrument. These light flashes were recorded on a moving film as a series of dots and knowing the film speed enabled the computation of engine revolutions per minute. Film speed was determined from timing lines… … Fig. 2—Elevations and plan of the Sperry Messenger airplane The photographic records of all of the above instruments were synchronized by means of timing lines placed simultaneously on all the records at defmite time intervals by an N. A. C. A. timer. (Reference 4.) , • , • u • Flight…
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