The TV 15000 test bed was built by FVRDE in 1964/65 to prove an aluminium hull and a new hydro-pneumatic suspension system for possible use in CVR(T). Although understood to have been originally built with a Rolls Royce B60 engine this was changed to a 4.2 litre Jaguar engine (as used in the Mk 10 Jaguar car as distinct from the later, lower powered military version as used in Scorpion & Fox) which is coupled to a Rolls Royce automatic gearbox and a modified Cletrac steering unit. The cooling system uses the same components as FV432, because these were readily available. The vehicle had cast aluminium wheels and forged aluminium tracks.
The hydro-pneumatic suspension gives an outstanding ride over all types of ground. The suspension unit was bolted to the vehicle and could easily be replaced but evaluation on TV15000 showed that it offered no major improvement in ride characteristics while it suffered from the disadvantages of being heavier and more expensive than the more conventional torsion bar type of suspension which was consequently adopted for the CVR(T).
This vehicle was the first British vehicle with aluminium armour and served to establish the feasibility of a very light, aluminium-armoured high-speed tank leading to the design of the CVR(T) Scorpion light tank and its derivatives.
"TF15000 was a test rig that incorporated certain technological and design aspects of CVR(T). It was first driven out of the Workshops at Chertsey on Christmas Eve 1965. It was originally powered by a Rolls-Royce Vanden-Plas engine, presumably a V-8. Said to be a variant of the Rolls-Royce B60 engine (although the B60 is a straight six). In fact it seems to have been fitted with a variety of engines including a General Motors diesel and a Jaguar petrol engine. TV15000 was also fitted with hydrogas suspension and the hull was made from aluminium."