USS Percival (DD-452)

For other ships with the same name, see USS Percival.

USS Percival (DD-452) was an experimental United States Navy destroyer who was never laid down and cancelled in 1946.

USS Hazelwood, who would have had a near identical appearance to Percival
History
United States
Name	USS Percival
Namesake	John Percival
Builder	Federal Shipbuilding and Drydock Company, Kearny, New Jersey (proposed)
Fate	Construction contract cancelled 7 January 1946
General characteristics
Class & type	Fletcher-class destroyer
Displacement	2,325 tons (standard) 2,924 tons (full load)
Length	369 ft 1 in (112.50 m) waterline 376 ft 5 in (114.73 m) oa
Beam	39 ft 7 in (12.07 m)
Draft	13 ft 9 in (4.19 m) (full load)
Propulsion	60,000 shp (45,000 kW); experimental high pressure boilers; 2 geared steam turbines; 2 screws
Speed	35 knots (65 km/h; 40 mph)
Range	6,500 nmi (12,000 km) at 15 kt
Complement	70
Armament	5 × 5 inch (127 mm)/38 caliber guns 1 × quad 1.1-inch (28 mm) autocannon mount 4 × 20 mm guns 10 × 21 inch (533 mm) torpedo tubes
Armor	Side: 0.75 inch (19 mm) Deck over machinery: 0.5 inch (12.7 mm)

Percival and sistership Watson were planned to be a variation of the Fletcher-class destroyer, with Percival fitted with an experimental high-pressure boiler system and Watson designed to run on diesel engines, compared to the standard design of 4 oil-burning boilers.^[1][2][3][4]

She was contracted out to Federal Shipbuilding on 1 July 1940. Like her sistership, more pressing matters delayed their construction and were both canceled on 7 January 1946.^[2][5] After cancelation, her novel machinery was installed in USS Timmerman, a modified Gearing-class destroyer, for testing. Timmerman was able to produce 100,000 shaft horsepower (shp) and a top speed of about 40 knots compared to a standard output of 60,000 shp.^[6][7]