B-29 Superfortress Service School Manual AR-234 point the sight up (90

point the sight up (90 deg) or down (-5 deg)

the pilot pulls out the pump knob to its limit and releases it

but we have no way to authenticate the document

The Suction Gage measured the amount of vacuum generated to power the pneumatically-operated gyroscopic instruments

The system uses an electric magnetic inductor element fixed to the aircraft in azimuth which detects the direction of the Earth’s magnetic field relative to the aircraft and transmits this information electrically to the gyro element

B-29 Superfortress Service School Manual AR-234 point the sight up (90This is an authentic WWII era compilation of original student training instructions for servicing the US Army Air Force Boeing B 29 Superfortress heavy bomber from the Academic Department of the Amarillo Army Air Field . This 1. 5 inch thick manual contains a collection of training instructions from 1944 and 1945 for select systems of the B 29, including air frames, ventilation, engines, hydraulics, electrical, etc. This was a personal compilation of