Wheel and Flap Position Indicator, 6531-1L-B Sunderland hence the suction gauge in

hence the suction gauge in the upper right corner to indicate the performance status of the pneumatic system

flows past the throat

The pointer floats a bit

The leaflet measures ~7 inches by ~5

and all components may not be present

Wheel and Flap Position Indicator, 6531-1L-B Sunderland hence the suction gauge inWe believe that this highly unusual iWheel and Flap Position Indicator is Pre WWII era. This is the first example of this kind of the many that we have seen. It was used in aircraft with either tricycle landing gear (i. e., nose wheel) or tail wheel configurations. Made by Pioneer Bendix, part number 6531 1L B. Given that the serial number is 36, many may not have been eventually made. When the individual wheels are down, the rotating display for each