Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura As the aircraft turned to

As the aircraft turned to the selected course

type number

The pendulum is geared to a pointer which revolves in a limited arc on a dial calibrated through the range from zero (level) to 30 degrees nose up or down

and to what degree

Sperry part number 647409

Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura As the aircraft turned toHere is a WW2 era German pneumatically powered "Wendehorizont" Gyro Horizon FI. 22427, made by Askania (see "Hersteller: bxx", bxx was the code for Askania). This Wendehorizont was used in aircraft of the Luftwaffe such as twin engine night fighters Messerschmidt ME 110, 210, and 410, and bombers Junkers JU 88, Heinkel HE 111, and Heinkel HE177 Greif. The knurled rim around the glass lens can be rotated, which cages (Fest) or releases (Los) the gyro.