4 Army WWII Aircraft Manuals TM 1-408, 1-409, 1-411, 1-650, published by the War Department, Washington, DC, 1941-1942

Manuals:

1. TM 1-408: War Department Technical Manual, Aircraft Engine Operation and Test, December 24, 1941 — illustrated — 64 pages

2. TM 1-09: War Department Technical Manual, Aircraft Armament and Pyrotechnics, July 30, 1941 — illustrated — 124 pages

3. TM 1-411: Army Air Forces Technical Training Command, Supplement Technical Manual, Airplane Hydraulic Systems and Miscellaneous Equipment, August 1, 1942 — b/w and color illustrated — 12 pages

4. TM 1-605: War Department Technical Manual, Maintenance Policies, Publications, and Forms, June 8, 1942 — illustrated — 45 pages