Aircraft Engines TM1-405 Jan 1945 Spanish The MN-20E was retrofitted on

The MN-20E was retrofitted on various P-40 Warhawk and P-51 Mustang models in the China/Burma/India theater

The "6C" prefix in the stores reference number indicates that this tachometer was intended as a test instrument

and checking the elevation mechanisms of fire control equipment

Also included is information on Japanese aircraft engines

4 Type F-1A Airspeed Indicators

Aircraft Engines TM1-405 Jan 1945 Spanish The MN-20E was retrofitted onThis is an authentic WWII era War Department Technical Manual, Aircraft Engines, TM1 405, published in January 1945. The 83 page manual covers the basics of design and operation of piston engines in use by the US armed forces during WWII. It is in very good condition given its age. Pages are yellowing as expected but appear to be all intact without tears.