Airspeed Indicator Fahrtmesser Fl 22231, 80 – 750 km/h Luftwaffe Sally Bomber The gyroscope was key to

The gyroscope was key to successful instrument flight from the early 1900's

It is different in its physical configuration as needed for installation in the sighting ring rimming the blister of the central fire director

According to the Maintenance Interchangeability gude dated Feb 1945

manufacturer unknown

The fuel/air ratio is displayed for the left engine on the upper scale

Airspeed Indicator Fahrtmesser Fl 22231, 80 – 750 km/h Luftwaffe Sally Bomber The gyroscope was key toHere is an original WWII era Airspeed Indicator Fahrtmesser Fl 22231, indicating speeds from 80 750 km h, as used in aircraft of the German Luftwaffe, such as the fighters Messerschmitt Bf 109, Bf 110, and bombers Junkers Ju 87, Ju 88, and Dornier Do 217. This indicator shows Fl 22231 embossed on its dial, and Fl 22230 on its rear case. The dial is clearly of the Fl 22231, so it is possible that the rear housing was replaced using that from a Fl 22230