Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura A smaller inner window rotates

A smaller inner window rotates and indicates hundreds of miles per hour

As the aircraft turned to the selected course

part number 1556-2K-A

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

Two BC-434-A Remote Control Boxes

Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura A smaller inner window rotatesHere 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.