Annual report - National Advisory Committee for Aeronautics (1915)
United States. National Advisory Committee for Aeronautics · Washington, U.S. Govt. Print. Off · leaf 508
ons 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 placed… … The photographic records of all of the above instruments were synchronized by means of timing lines placed simultaneously on all the records at definite time intervals by an N. A. C . A. timer. (Reference 4.) Flight Tests. — Preliminary tests were made in level flight to determine the airworthiness…
Aeronautics · Aeronautics, Military · United States. National Advisory Committee for Aeronautics · Aeronautics -- United States -- Periodicals · Aeronautics, Military -- United States -- Periodicals
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
