Flight Computer, Japanese BT-14 Provides an electrical impulse every

Provides an electrical impulse every 4 hours (standard naval watch period)

The system had some usage but the poor accuracy of the aircraft Altimeters made the system unreliable

Basic Theory and Practice (TO 30-100A-1

One of the dividers appears to have green ink on it

Measures ~3 inches diameter and 5 inches deep

Flight Computer, Japanese BT-14 Provides an electrical impulse everyThis is an original, authentic Flight Computer used by pilots of the Japanese during WWII. Typically these were used to determine critical factors of flight and navigation while in the air. The dial on the face and the slide rotates along the reverse side. The airspeed arm rotates left and right and moves up and back along the handle. The glass on the dial is cracked but otherwise the instrument is in very good condition given its age. Measures 12 in