Bombardiers' Information File US Army Air Force May 1945 Piasecki TBM Avenger Torpedo Bomber

TBM Avenger Torpedo Bomber

This is a centrifugal tachometer: as the rotation of the engine shaft rotates a cable attached to the case

To permit dropping the radio set in this manner

So it is possible that there is some connection there

Controls on the front are Focus

Bombardiers' Information File US Army Air Force May 1945 Piasecki TBM Avenger Torpedo BomberHere is a WWII era Bombardiers' Information File published by the US Army Air Force May 1945. It contains the essential information on the duties and responsibilities of the bombardier. It is in exceptional condition given its age. Measures 8. 5 x 11 inches, and ~0. 5 inches thick.