Aircraft Instruments Technical Instructions, Air Corps Technical School, 1939 C-130

Aircraft Instruments Technical Instructions, Air Corps Technical School, 1939 C-130Here is a pre WWII era Technical Instruction reference manual for students of the Air Corps Technical School, published in October 1939, for use in training aircraft instrument technicians of the US Army Air Corps. This 258 page, 8. 5 by 11 inch technical manual covers all of the most commonly used instruments used in aircraft of the era, including pressure, temperature, and quantity gauges, compasses, turn, climb, and airspeed indicators, gyro

Measures 4 inches diameter and ~11 inches deep

See the windshield parts diagram from its parts list dated December 1955

See photo of Tony instrument panel showing the location of this compass from a book by WWII Japanese Aircraft researcher Robert Mikesh

and paired with one more dual tachometer for engines 3 & 4 in heavy bombers such as B-17 Flying Fortress

but not for a full eight days

The fluid is discolored and about 2/3rds level

the position of a graduated card attached to the float is visible through a glass cover in the front of the bowl

unscrew the collar (I) and pull the lamp support assembly straight out

Kollsman FSSC number 88-C-855 was made for aircraft of the US Navy

Weston model 1534

but the content pertains to aircraft instruments common in the early 1940's

and the knob rotates