00868cam a22002291 4500 war21000068 DLC 20260227112812.0 831021s1921 dcuaf f000 0 eng war21000068 (OCoLC)10043050 DLC FDbER OCoLC DLC premarc TL705 .U5 1920 United States. Army. Air Corps. ...The airplane propeller. Prepared by the Propeller section, Engineering division, McCook Field, Dayton, Ohio. January, 1920. Washington, Govt. print. off., 1921. 337 p. incl. illus., tables, fold. pl., diagrs (part fold) ; 23 cm. On verso of t.p.: War department. Document no. 998. Office of the adjutant general. Propellers, Aerial. United States. Adjutant-General's Office. 92373 92373