Caldwell-class destroyer

Last updated
USS Caldwell (DD-69).jpg
USS Caldwell in harbor in 1919
Class overview
NameCaldwell class
Builders
Operators
Preceded by Sampson class
Succeeded by Wickes class
Subclasses Town class
Built1916–20
In commission1917–45
Completed6
Retired6
General characteristics
Type Destroyer
Displacement
  • 1,020 tons (standard)
  • 1,125 tons (normal)
Length
  • 308 ft (94 m) waterline
  • 315 ft 6 in (96.16 m) overall
Beam31 ft 3 in (9.53 m)
Draft
  • 8 ft (2.4 m)
  • 11 ft 6 in (3.51 m) max
Propulsion
Speed
  • (DD 69-71, 74) 32 kn (59 km/h) [1]
  • (DD 72-73) 30 kn (56 km/h)
Complement146
Armament

The Caldwell class was a class of six "flush deck" United States Navy destroyers built during World War I and shortly after. Four served as convoy escorts in the Atlantic; the other two were completed too late for wartime service. Two were scrapped during the 1930s, but four survived to serve throughout World War II, three of these in service with the Royal Navy under the Destroyers for Bases Agreement and the fourth as a high speed transport.

Contents

Design and construction

The six Caldwell-class torpedo boat destroyers were authorized by Congress under the Act of 3 March 1915, "to have a speed of not less than thirty knots per hour [sic] and to cost, exclusive of armor and armament, not to exceed $925,000.00 each ...Provided, that three of said torpedo-boats herein authorized shall be built on the Pacific Coast."

Built from 1916 to 1918, the six ships of the Caldwell class were the first of 279 ordered (6 of which were cancelled) to a flush-decked design to remove the forecastle break weakness of the preceding Sampson class and other "thousand tonners". They were effectively prototypes of the mass production Wickes and Clemson-class vessels which followed them, although somewhat slower (30–32 knots (56–59 km/h) vs. 35 knots (65 km/h)) and differing in some details. The forward sheer of the Caldwell class was improved to keep "A" mount from being constantly washed out; however, this was unsuccessful. [3] The Caldwells had a cutaway stern rather than the cruiser stern of the later ships, and thus had a tighter turning radius than their successors. [3] [4] The armament of the Sampsons was retained, but the broadside 4-inch (102 mm) guns were relocated to "bandstands" aft of the bridge. There were differences in appearance; Caldwell, Craven and Manley were built with four "stacks" (funnels), while Gwin, Conner and Stockton had only three. The middle stack of the three-stack ships was wider due to combining two boiler uptakes. Once the mass-production destroyers made the design prevalent, the Caldwells and their successors became known as "flush-deck" or "four-stack" destroyers. [5]

Manley was converted to a prototype high-speed destroyer transport (hull classification symbol APD) in 1939, with her forward stacks and boilers removed to give her the capacity to lift 200 Marines and four 11 m (36 ft) Higgins assault boats (LCP(L), LCP(R), or LCVP). She saw action at Guadalcanal, Kwajalein, Saipan, and the Philippines.

Three entered Royal Navy service in 1940 under the Destroyers for Bases Agreement as part of the Town class. Conner, serving as HMS Leeds, provided cover at Gold Beach on 6 June 1944; her sisters served as convoy escorts. All three survived the war, two being sunk as targets and one scrapped, postwar.

Armament

The armament repeated that of the preceding Sampson-class of "thousand tonners", and would be retained in the subsequent mass production "flush deckers". While the gun armament was typical for destroyers of this period, the torpedo armament of twelve 21-inch (533 mm) torpedo tubes was larger than usual, in accordance with American practice at the time. A factor in the size of the torpedo armament was the General Board's decision to use broadside rather than centerline torpedo tubes. [6] This was due to the desire to have some torpedoes remaining after firing a broadside, and problems experienced with centerline mounts on previous classes with torpedoes striking the gunwales of the firing ship. [7] The Mark 8 torpedo was equipped. The "bandstand" location of the waist 4-inch guns kept the mounts dry, but restricted the firing arc.

These ships carried a 3-inch (76 mm) 23 caliber anti-aircraft (AA) gun, typically just aft of the bow 4-inch gun. The original design called for two 1-pounder AA guns, but these were in short supply and the 3-inch gun was more effective. Anti-submarine (ASW) armament was added during World War I, or included in the initial design with DD-70 and DD-71. Typically, a single depth charge rack was provided aft, along with a Y-gun depth charge projector forward of the aft deckhouse. [8]

Engineering

As a somewhat experimental class, the Caldwells differed in their engineering. Conner and Stockton, built by Cramp, followed the class's original design, with three-shaft direct drive steam turbines. A high-pressure turbine on the center shaft exhausted to low-pressure turbines on the outboard shafts. A geared cruising turbine was provided on the center shaft for fuel economy at low and moderate speeds. The remaining ships had two shafts with geared turbines and no cruising turbines. [9] This arrangement saw an increase from 18,500 to 20,000 shaft horsepower (13,800 to 14,900 kW) and the ships' speed from 30 to 32 knots (56 to 59 km/h; 35 to 37 mph). With a further increase in horsepower, this geared turbine arrangement was adopted for the mass-production classes. [1] Caldwell had an experimental "electric speed reducing gear" connecting the cruising turbines to the main turbines, a forerunner of the turbo-electric drive that would be used on several US battleships and aircraft carriers built from World War I through the 1920s. [3] [8]

Ships in class

Ships of the Caldwell destroyer class
Hull no.NameBuilderLaid downLaunchedComm-
issioned
Decomm-
issioned
FateService notes
DD-69 Caldwell Mare Island Navy Yard 8 December 191610 July 19171 December 191727 June 1922Scrapped 1936
DD-70 Craven Norfolk Navy Yard 20 November 191729 June 191819 October 191815 June 1922Scuttled May 1946Transferred to Royal Navy as HMS Lewes
9 August 194023 October 1940
DD-71 Gwin Seattle Dry Dock Company 21 June 191722 December 191720 March 192028 June 1922Scrapped 1939
DD-72 Conner William Cramp & Sons 16 October 191621 August 191712 January 191821 June 1922Scrapped March 1947Transferred to Royal Navy as HMS Leeds
23 August 194023 October 1940
DD-73 Stockton William Cramp & Sons 16 October 191617 July 171726 November 191726 June 1922Scuttled July 1945Transferred to Royal Navy as HMS Ludlow
16 August 194023 October 1940
DD-74 Manley Bath Iron Works 22 August 191623 August 191715 October 191714 June 1922Scrapped 1946Re-designated AG-28 on 28 November 1938; Re-designated APD-1 on 2 August 1940
1 May 193019 November 1945

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References

  1. 1 2 "USS Craven". DestroyerHistory.org. Retrieved 7 June 2015.
  2. Campbell 1985 p. 143
  3. 1 2 3 Gardiner, p. 123
  4. Friedman, p. 36
  5. "Flush-deckers". DestroyerHistory.org. Retrieved 7 June 2015.
  6. Friedman, p. 24, 34
  7. Friedman, p. 24
  8. 1 2 Friedman, p. 37
  9. Bauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775-1990: Major Combatants. Westport, Connecticut: Greenwood Press. p. 172. ISBN   0-313-26202-0.

Bibliography