Rate of Climb / Vertical Airspeed Indicator Pioneer 1625-1Q-C1 TBM Avenger Reference Number 41-7954

Reference Number 41-7954

with a service stamp of Oct 1968

and junction box

the faceplate rotates to indicate the selected frequency within the small metal frame (to which a small lamp could be affixed for illumination)

this Boresight Telescope

Rate of Climb / Vertical Airspeed Indicator Pioneer 1625-1Q-C1 TBM Avenger Reference Number 41-7954Here is a WW2 vintage Rate of Climb (Vertical Airspeed) Indicator, made by Pioneer, similar to those used in the US Navy's PBY 5A Catalina. It was for aircraft with shallow slow climb descent speed i. e. maximum 2000 ft minute. The pointer is calibrated by turning the screw in the lower left corner. The inside of the glass could use some cleaning. Measures 3. 25 inches diameter and 4 inches deep.