HMS Trenchant is a British Trafalgar Class fleet submarine of 5208 tons displacement dived launched in 1986. HMS Trenchant is powered by a pressurised water-cooled PWR 1 nuclear reactor with two Paxman auxiliary diesel engines, providing a top speed of 32 knots dived. HMS Trenchant carries a crew of 97 including 12 officers and is armed with McDonn... Found on http://www.probertencyclopaedia.com/browse/RT.HTM