Aircraft Pelorus, US Army Air Corps Type A-2 North American Aviation 25 inches diameter and ~3

25 inches diameter and ~3 inches deep

The indicator marked for engines 1 & 2 was made by Ranco with a 1943 manufacturing serial number prefix

The serial number

This camera

Aircraft Pelorus, US Army Air Corps Type A-2 North American Aviation 25 inches diameter and ~3This is a rare find. It is the only one we've seen in our many years of collecting aviation artifacts. Here is a very fine example of an Aircraft Pelorus, Type A 2, an early navigational aid used in aircraft of the US Army Air Corps. It has a serial number prefix of AC 39, evidence of a 1939 year of manufacture. From Air Navigation Technical Manual TM 1 205 1940 US Army Air Corps (the reference call outs refer to the diagram in the photo gallery