Rate of Climb / Vertical Airspeed Indicator Pioneer 1625-1Q-C1 TBM Avenger and junction box

and junction box

The black projector was installed above a map table at the navigators station at the height specified by the height gauge included in the kit

Reference Number 41-7954

made by General Aero Prod Corp

Rate of Climb / Vertical Airspeed Indicator Pioneer 1625-1Q-C1 TBM Avenger and junction boxHere 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.