Control Unit C-4, of ARN-7 Automatic Radio Compass, B-17, B-24, B-29 Mosquito

Control Unit C-4, of ARN-7 Automatic Radio Compass, B-17, B-24, B-29 MosquitoHere is a WWII era Control Unit for the ARN 7 Automatic Radio Compass system used for direction finding and homing. The receiver function tunes from 100 1750 kHz across 4 bands, which were selected by rotating the center knob below the frequency band window. The center knob rotates a flexible shaft connected to a rotatable loop antenna. The ARN 7 system (see diagram), were one of several generations of radio navigational systems installed in an

The type of aircraft which used this tachometer has not yet been identified by us

This indicator provided a feedback loop to the crewman thus enabling him to ensure proper wing temperature

so that the pointer may be set to zero at any existing atmospheric pressure between 28 and 30 inches of mercury

Here is a fine example of the US Navy's Aircraft Direct Reading Magnetic Compass Mark VIII

When it is being used

mso-fareast-language:#0400

black dial stopwatch under military specification no

"huff-duff") receivers

The A-9A regulator was a low pressure continuous flow regulator (vs the on-demand

(The prism has a small chip in its lower left corner)

Model 8DJ12LAF

The part number on the unit is not legible