Jaguar Air Data Computer

Technical Information

Catalogue No: C0157
Category: Air Data
Object Type: Signal/Data Processor
Object Name: Jaguar Air Data Computer
Part No: 81-01-21
Serial No: EX: 001/69
Manufacturer: Elliott Bros
Division: Unknown
Platform(s): Jaguar 
Year of Manufacture: 1969
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

Air Data Computer
Type No 81-01-21
Ser No EX: 001/69


An order for modular air data computers for British-built Jaguars, worth more than £250,000, was placed with Elliott Flight Automation by Mintech in1970. The unit was the smallest and lightest for its performance yet developed. A pre-production unit was flown in the S.06 prototype on its first flight in1969.

The air data computer in the Jaguar forms a single central source of corrected signals of height, indicated airspeed, true airspeed, Mach number and related information, giving 16 different outputs for flight instruments, head-up display, navigation and weapon aiming. It also provides a digitised output of height for automatic altitude reporting through the secondary radar transponder. Individual functional modules can be replaced without recalibrating The mechanical transmission between modules also reduces weight and improves reliability. The unit occupies a ½ATR short case.

Performance is continually monitored in flight and the pilot notified of any malfunction. On the ground, technicians can test the computer and height encoder in the aircraft simply by pressing the appropriate buttons and observing lights on the front of the box. Test sockets allow more detailed analysis of all outputs.

The new equipment is a lightweight, miniature version of the range of air data computers which are already being produced for the Nimrod, the American Lockheed C-5A heavy logistics transport, BAC 1-11, HS.748s for the Royal Australian Air Force and for the engine intake control system of the Concorde.

This unit is an experimental ADC and has transparent sides to view the complex electro-mechanical construction. Its lower cover and several modules are missing.

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