The Paulding-class destroyers were a series of United States Navy destroyers derived from the Smith class with the torpedo tubes increased from three to six via twin mounts. They were the first destroyers in the US Navy with oil-fired boilers. The 21 Pauldings doubled the number of destroyers in the US Navy. The Paulding class derived its name from the class's lead ship, Paulding, named for Rear Admiral Hiram Paulding (1797–1878). Like the Smiths, they were nicknamed "flivvers" after the small and shaky Model T Ford once the larger "thousand tonner" destroyers entered service. Generally 21 ships, hull numbers 22 through 42, are considered Pauldings. However, some references list hull numbers 32 through 42 as the Monaghan class. Others break out hulls 24–28, 30, 31, 33 and 36 as Roe class, with hulls 32, 35, and 38–42 as Monaghan class. Curiously, Jane's Fighting Ships of World War I refers to hulls 22–42 as the 21 [ships of the] Drayton class, going on to say "Unofficially known as 'Flivver Type'"; the book includes Paulding in the class listing, but not as the class leader.