Tornado E-Scope Head-Down Display

Technical Information

Catalogue No: C0062
Category: Head-Down Display [HDD]
Object Type: Display Unit
Object Name: Tornado E-Scope Head-Down Display
Part No: Unreadable
Serial No: 0007
Manufacturer: Elliott Bros
Division: Airborne Display [ADD]
Platform(s): Tornado 
Year of Manufacture: circa 1979
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

Type No. ???????
Ref. No. ??????5?
Ser. No. 0007


The E-scope was fitted to the Interdictor Strike Version of the Tornado GR1. A key piece of equipment in this version is the Terrain Following Radar which feeds an automatic terrain following system. This system controls the flight path of the aircraft to a pre-set clearance height above the terrain. The computer generates a theoretical "ski-toe" shaped envelope in front of the aircraft and compares this to the actual radar terrain return. If at any point terrain is found to penetrate into the envelope an automatic pull-up command is given. The E-Scope displays the theoretical and actual envelopes so that the pilot can monitor the system at all times. While the radar information is in polar co-ordinate it is presented in a modified form on the display: the vertical axis represents antenna angle while the horizontal axis represents the logarithm of range. For the E-Scope, Marconi-Elliott Avionic Systems Limited adopted a novel technique of logarithmic processing of the range information to preserve a simpler linear X-deflection scan. The principal advantage of this approach is the efficiency resulting from the processing of low voltage signals instead of high current deflection waveforms.

The E-Scope uses a high brightness green monochrome Cathode Ray Tube with a contrast enhancement filter. This is a functional unit but currently lacks the top cover.

It would have been manufactured around 1979.

The E-Scope had system trials on Buccaneer XT272 in 1980 at Warton and was shoehorned into the front cockpit.

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