Flight Computer кнп-57 USSR Soviet Air Force 1957 F-84 This direct-reading magnetic compass module

This direct-reading magnetic compass module was used in the "Wimperis" Course-Setting Bomb Sight of the British Royal Air Force

The extra 'touch' for this clock is the custom metal and wood case/stand

The slide itself has a red index marker to align with the frequency measurement scale on the Slide Bar

so we aren't sure of the exact function or application

By plotting this information on a chart and by applying the wind vector

Flight Computer кнп-57 USSR Soviet Air Force 1957 F-84 This direct-reading magnetic compass moduleThis is an authentic 57 Soviet Flight Computer, essentially equivalent to the western design E6 B. The front compass side is of a normal design, but the reverse side calculator combines a traditional slip stick with a wide array of useful aviation calculations. It is marked as having been The device is constructed of a very stiff durable plastic which almost feels like ivory. Measures ~10 in x ~4. 5 in.