Lightning Air Data Computer

Technical Information

Catalogue No: C0188
Category: Air Data
Object Type: Signal/Data Processor
Object Name: Lightning Air Data Computer
Part No: 3D 5610/2 Ref 6TG/5211
Serial No: 228/67
Manufacturer: Elliott Bros
Division: Unknown
Platform(s): Lightning 
Year of Manufacture: 1967
Dimensions:
Width (mm):
325 
Height (mm):
145 
Depth (mm):
420 
Weight (g):
10,680 
Location: Archive Object Store
Inscription(s):

Elliott
Air Data Computer Type 'D'
Type No. 3D 5610/2
Ref. No. 6TG/5211
Ser. No. 228/67
────────────────
INSPECTION STAMP:
EBL 606

Notes:

Marconi Ref: 2014

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 Type 'D' unit was in the original Marconi collection (Ref: 2014) The complexity of the analogue electro-mechanical design with its nine electrical (Plessey type) connections on front panel can be seen in this early example of an Air Data Computer.

Click to enlarge Click to enlarge