Document Type: Technical Research Report Authority: Government Military (authoritative reference) Document Number: Technical Orders No. 23 [Air Service Information Circular (Aviation and Aerostation) Vol. IV, No. 348] (dated March, 1922).

Scope: Compilation report prepared by Engineering Division, Air Service, McCook Field.

Contents: Contains short but detailed summary information on all activities of the U.S. Army AIr Service Engineering Division, as well as a survey of developments in aeronautics and aviation writ large, especially military aviation.

Chapters include: - NEW DESIGN -- Airplanes -- Balloons and Airships -- Engines -- Armament -- Equipment -- McCook Field Five-Foot Wind Tunnel - EXPERIMENTATION -- Resume of Engineering Division Serial Reports -- Investigation of Materials - FOREIGN DEVELOPMENT -- Aeronautics in Belgium -- Wind Tunnels at Rhode St. Genese -- Italian Military Airplanes (Proposed Types) -- Marchetti Pursuit --Ricci R-1B Bomber - NEW BOOKS AND DOCUMENTS -- Latest Documents on Aeronautics -- Recent Accessions to Engineering Division Library

Related to aircraft engines, the report includes information on the Lawrance R-1 (Radial) 140 h.p. 9 cylinder air-cooled engine and the following water-cooled types: Liberty "12" (standard Engine), Liberty "12" (1921 model), Packard "1A-1237" 300 h.p. 12 cylinder, Wright "H" 300 h.p. 8 cylinder and Wright "H-3" 300 h.p. 8 cyclinder.