Air-position indicator Mk.1A

Air-position indicator Mk.1A

The Air Position Indicator was developed concurrently with the Air Mileage Unit during the Second World War and provides a continuous and automatic air plot, as well as showing the aircraft heading. No allowance, however, is made for wind speed.

The aircraft heading from the D.R. Gyro-Magnetic Compass through the variation setting Control, is obtained electrically and drives the repeater motor. Air speed is obtained from the air linkage Unit through a flexible drive, and this enables the heading to be resolved continuously into N-S and E-W components, which after conversion are fed to counters indicating Latitude and Longitude.

Details

Category:
Navigation
Object Number:
1951-189
type:
indicator
credit:
Banfield, Arthur Clive

Parts

Air-position indicator Mk.1A, one of two parts

Air-position indicator Mk.1A, one of two parts

One of two parts of air-position indicator Mk.1A

Object Number:
1951-189/1
type:
indicator
Air-position indicator Mk.1A, one of two parts

Air-position indicator Mk.1A, one of two parts

One of two parts of air-position indicator Mk.1A

Object Number:
1951-189/2
type:
indicator