|Object Name:||ADC IAS Output Module|
|Year of Manufacture:||circa 1968|
|Location:||Rack RAA10 [Main Store]|
I.A.S. Output Module
One of the electro-mechanical modules from the Nimrod Mk.1 Air Data Computer.
This module provides the Indicated Air Speed (IAS) output signals to other aircraft systems as synchro, potentiometers and switched discrete signals. Note the use of:
1) the cam-operated microswitches;
2) the coil-springs that ensure the gear teeth always mesh in one direction, thereby eliminating backlash errors;
3) the analogue cam that drives a differential gear mechanism (with the bevel gears) to introduce a non-linear element in shaft rotation.
This electro-mechanical unit is essentially a little calculator which serves to provide the Indicated Airspeed from the input Pitot and Static probe connections to the Air Data Computer.