Boscombe Down testing of the Albacore and Taurus II engine, in February 1940, showed a maximum speed of 160 mph (258 km/h), at an altitude of 4,800 ft (1,463 m), at 11,570 lb (5,259 kg), which was achieved with four under-wing depth charges, while maximum speed without the depth charges was 172 mph (277 km/h).