Navigadget Mark I Flight Computer Battle Type IN-4D

Type IN-4D

Here is a WWII-era pneumatic Directional Gyro/Turn Indicator made by Jack & Heintz

and PBM Mariner

Restoration inquiries are welcome

This is an original Cold-War-Era US Air Force Manual Bombs and Bombing Systems for Aircraft Observers dated January 1956

Navigadget Mark I Flight Computer Battle Type IN-4DThis highly unusual Navigadget Mark I Flight Computer is the first and only one of its kind that we've run across. Measuring 10 x 5. 25 inches and painted on aluminum, this device seem intended to be placed on a chart with a scale of 1. 25 inches = 10 miles, with the left "Miles" scale placed along the intended flight path. The center axis intersecting at the 40 Mile mark is the calculated ground speed, from 60 to 150 MPH. The aluminum semi circle