The Gyro Applied by K.I.T. Richardson Bf-109 the aircraft was traveling at

the aircraft was traveling at 820 km/h

GE Type DJ-4

and the vertical bar deflects to give an appropriate "fly right" or "fly left" indication

likely when they were removed from the aircraft

This is a fine example of an early WWII-era German Wendezeiger (Turn and Bank) Fl 22402

The Gyro Applied by K.I.T. Richardson Bf-109 the aircraft was traveling atThe Gyro Applied book, published in 1954, covers the fundamentals of gyroscopes and their applications in aeronautics and military and marine applications. The gyroscope was key to successful instrument flight from the early 1900's, and was central to many aviation instruments and automatic pilot systems. The 384 page book is in good condition.