Aircraft Pelorus, US Army Air Corps Type A-2 North American Aviation The indicator marked for engines

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

The compass card containing the markings of the compass rotated to indicate magnetic north as it received signals from the master unit (in the Lanc

The serial number

the International Commission for Air Navigation

000 ft of altitude

Aircraft Pelorus, US Army Air Corps Type A-2 North American Aviation The indicator marked for enginesThis 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