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

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

Here is an early WWII-era Vertical Speed (Rate of Climb) Indicator made by Kollsman

More about Lt

The fluid is intact

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

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