|Object Type:||Signal/Data Processor|
|Object Name:||Lightning Air Data Computer|
|Part No:||3D 5610/2 Ref 6TG/5211|
|Year of Manufacture:||1967|
|Location:||Archive Object Store|
Air Data Computer Type 'D'
Type No. 3D 5610/2
Ref. No. 6TG/5211
Ser. No. 228/67
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.