Aircraft Engines TM1-405 Jan 1945 Spanish and checking the elevation mechanisms

and checking the elevation mechanisms of fire control equipment

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

The cover page page was missing

4 Type F-1A Airspeed Indicators

Aircraft Engines TM1-405 Jan 1945 Spanish and checking the elevation mechanismsThis 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.