Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura Sperry part number 647409

Sperry part number 647409

Included in the kit are:

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

the cover is no longer attached to its staples

Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura Sperry part number 647409Here 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.