|Category:||Head-Up Display [HUD]|
|Object Type:||Display Unit|
|Object Name:||TSR-2 HUD Pilot's Display Unit|
|Year of Manufacture:||1963|
|Location:||Main Object Store|
Pilot's Display Unit MkV.
Ref. No. 5826-99-102--9606
Ser. No. B8
Spec. No. VES1001/
Mod. Record 1
In January 1959 the Ministry of Supply, announced that the RAF’s supersonic strike-reconnaissance aircraft was to be developed jointly by Vickers-Armstrongs (Aircraft) and English Electric. The operational requirement included an 11° overnose line from the pilot’s eye reference. The windscreen was set at 35° to the horizontal to optimise the field of view which in turn compromised the HUD position. The TSR-2 HUD was designed by Cintel in 1963 to Spec VES1001 and was fitted to the aircraft which first flew in September 1964. The HUD used a 6.5” refractive optic and the HUD projected onto the inside of the windshield; there was no separate Combiner Glass in order to avoid the heavy support structure. However the windshield glass was extremely thick to give adequate birdstrike protection and this gave multiple reflections off inner and outer surfaces and still distorted too much at high speed. This solution was also very expensive, required a large and very heavy optical system (because the HUD was located so far away from the windshield). Achieving all the alignments and accuracies proved difficult and it was known that the windscreen deflection would give rise to boresighting problems.
On 6 April 1965 the cancellation of the TSR-2 was announced in the House of Commons. The Secretary of State for Defence, Denis Healey, explained that the government had been very reluctant to do so, but that the cost of the TSR-2 program was becoming an "intolerable burden", because the total cost of £750million amounted to £5million per aircraft, assuming a production of 150 aircraft. After cancellation, the three TSR-2s built were immediately grounded; they were never to fly again. Only three of the 20 HUDs made are known to still survive.
Interestingly this PDU has a Smiths Industries label and this has always been a mystery. The label has no other data like Part No or Serial No; only an MoD number which we have been unable to track. So, perhaps the label was put on by mistake; it is a more modern material and fixed much less securely so may have fallen off something else.
This unit was acquired from eBay and was originally at RAE Bedford.
The optics is marked:-
"5in Lens Unit f/0.83