UB.109T, better known as Red Rapier, was a British cruise missile project calling for a system able to deliver a 5,000 lb (2.27 tonne) conventional warhead within 100 yards of its target at over 400 nautical miles (740 km; 460 mi) range while travelling at 600 mph (970 km/h) at 50,000 ft (15,000 m).