HC Deb 15 February 1993 vol 219 cc68-9W
Mr. Jopling

To ask the Secretary of State for Defence how many powerpacks had to be changed in Challenger I tanks during the Gulf operation; who that powerpack differs from the one in Challenger II; and if he will make a statement.

Mr. Aitken

A total of 279 powerpacks were changed during the deployment of Challenger I to the Gulf. The majority of engine failures were caused by dust ingestion.

The Challenger II powerpack comprises of CV12 engine coupled to a TN54 gearbox which has six instead of the four forward ratios of the Challenger I gearbox. The powerpack, which is controlled by a new digital automotive system control unit, represents a significant improvement in reliability. In addition to a totally new main engine cleaner design, numerous reliability modifications have been embodied in the engine and the gearbox.

Mr. Jopling

To ask the Secretary of State for Defence what response he made to the request of the manufacturers for the release of a Challenger II battle tank in order to seek to win the Swedish Army order.

Mr. Aitken

Vickers Defence Systems made no request for the release of a Challenger II prototype in order to participate in the Swedish competition.

Mr. Foulkes

To ask the Secretary of State for Defence what progress has been achieved in the plans announced in June 1991 for an upgrade programme on the Challenger 1 fleet.

Mr. Aitken

A detailed study has been undertaken by Vickers Defence Systems and this is now under evaluation by the Department. A range of options is being considered.