Directional Gyro Control, USAF Type E-4 Autopilot/A-12 Gyrosyn, 673447 & Clear Cover Lily Bomber Here is a Rate of

Here is a Rate of Climb / Vertical Speed Indicator

It is in terrific condition given its age

The maximum capacity displayed on the indicator is 230

US Navy AN-5761-1 (former Army Type C-14A)

At almost 200 pages

Directional Gyro Control, USAF Type E-4 Autopilot/A-12 Gyrosyn, 673447 & Clear Cover Lily Bomber Here is a Rate ofHere is a Directional Gyro Control of the Sperry A 12 Gyrosyn Automatic Pilot, known in the US Air Force as the Type E 4 autopilot system during the late 1940's and 1950's. The USAF type is S3A, and the Sperry part number is 673447. When electrically powered and in flight, the gyro produced directional indication signals which were amplified and transmitted to the autopilot system and indicators on the flight deck of the aircraft. The cover can be