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Lightning Air Data Computer

Technical Information

Catalogue No: C0190
Category: Air Data
Object Type: Signal/Data Processor
Object Name: Lightning Air Data Computer
Part No: 81D62-A-1
Serial No: 414/65
Manufacturer: Elliott Bros
Division: Unknown
Platform(s): Lightning 
Year of Manufacture: 1965
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Main Object Store

A.D. Computer Mk.2 Type C
Type No. 81D62-A-1
Ref No.
Ser No. 414/65
T.No. 81D62-A-1
S.No. 414/65
Mod. No.
ADS 192, 200


The Lightning was the RAF’s first fighter capable of achieving Mach 2 in level flight but also the first designed as an integrated weapon system. The first prototype flew in August 1954. Elliott’s designed a wide range of equipment for the Lightning.
The Air Data Computer computations are done with mechanical gears and cams which translate the sensor inputs into analogue output signals.
The inputs sensed are ratio of static to dynamic pressure and static pressure, angle of attack and total temperature. The function of the computer is to form a central source of indicated airspeed, true airspeed, height, Mach number and related signals required for flight instruments, autopilots, navigation, weapon aiming and similar systems.

This is a ‘Mk.2 Type C’ Air Data Computer and has four large electrical (Plessey type) connections on front panel.

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