United States R class submarine

For other ship classes of the same name, see British R class submarine and Italian R class submarine.

Tied up along the dock from right to left: R-12 (SS-89), R-15 (SS-92), R-13 (SS-90) with R-9 (SS-86) and an unidentified R-boat probably in Pearl Harbor, c. mid 1920s.
Class overview
Builders:	Fore River Shipyard (R-1 to R-14) Union Iron Works (R-15 to R-20) Lake Torpedo Boat (R-21 to R-27) Electric Boat (4 boats for Peru)
Operators:	United States Navy Peruvian Navy
Preceded by:	O-class submarine
Succeeded by:	S-class submarine
In commission:	1918–1945
Completed:	27
Lost:	1
Retired:	26
General characteristics
Type:	Submarine
Displacement:	569 long tons (578 t) surfaced 680 long tons (691 t) submerged
Length:	186 ft 2 in (56.74 m)
Beam:	18 ft (5.5 m)
Draft:	14 ft 6 in (4.42 m)
Propulsion:	Diesel-electric
Speed:	13.5 knots (25.0 km/h; 15.5 mph) surfaced 10.5 knots (19.4 km/h; 12.1 mph) submerged
Complement:	30 officers and men
Armament:	• 4 × 21 in (533 mm) torpedo tubes • 1 × 3"/50 caliber deck gun

The R-class submarines were a class of United States Navy double hull submarines active from 1918 until 1945. The R-boats R-21 to R-27, built by Lake Torpedo Boat, slightly smaller and faster than the others, are sometimes regarded (by DANFS for instance) as a separate class ("R-21 class") from R-1 to R-20 built by Fore River Shipyard and Union Iron Works ("R-1 class"). The Electric Boat has build four boats for Peruvian Navy. Unlike double hull Lake's boats, these single-hull submarines were very similar to the preceding O class, with the addition of 21-inch torpedo tubes and a fixed rather than retractable gun mount. Lake boats had their diving planes more conventionally positioned fore and aft, but they retained the characteristic wide stern and 18-inch torpedo tubes. The boats for Peru (R-1 to R-4) were built after World War I using material assembled for cancelled S-class submarines. They were refitted in 1935–1936 and 1955–1956, renamed the Islay, the Casma, the Pacocha, and the Arica in 1957, and discarded in 1960.

Ships

• USS R-1 (SS-78) - Commissioned 1918, scrapped 1946
• USS R-2 (SS-79) - Commissioned 1919, scrapped 1945
• USS R-3 (SS-80) - Commissioned 1919, scrapped 1948
• USS R-4 (SS-81) - Commissioned 1919, scrapped 1946
• USS R-5 (SS-82) - Commissioned 1919, scrapped 1946
• USS R-6 (SS-83) - Commissioned 1919, scrapped 1946
• USS R-7 (SS-84) - Commissioned 1919, scrapped 1946
• USS R-8 (SS-85) - Commissioned 1919, sunk as target, 1936
• USS R-9 (SS-86) - Commissioned 1919, scrapped 1946
• USS R-10 (SS-87) - Commissioned 1919, scrapped 1946
• USS R-11 (SS-88) - Commissioned 1919, scrapped 1946
• USS R-12 (SS-89) - Commissioned 1919, lost June 1943 in a training accident off Key West, Florida
• USS R-13 (SS-90) - Commissioned 1919, scrapped 1946
• USS R-14 (SS-91) - Commissioned 1919, scrapped 1945
• USS R-15 (SS-92) - Commissioned 1919, scrapped 1946
• USS R-16 (SS-93) - Commissioned 1919, scrapped 1946
• USS R-17 (SS-94) - Commissioned 1918, scrapped 1945
• USS R-18 (SS-95) - Commissioned 1918, scrapped 1946
• USS R-19 (SS-96) - Commissioned 1918, transferred to United Kingdom May 1942, lost in collision June 1942
• USS R-20 (SS-97) - Commissioned 1919, scrapped 1946
• USS R-21 (SS-98) - Commissioned 1919, scrapped 1930
• USS R-22 (SS-99) - Commissioned 1919, scrapped 1930
• USS R-23 (SS-100) - Commissioned 1919, scrapped 1930
• USS R-24 (SS-101) - Commissioned 1919, scrapped 1930
• USS R-25 (SS-102) - Commissioned 1919, scrapped 1930
• USS R-26 (SS-103) - Commissioned 1919, scrapped 1930
• USS R-27 (SS-104) - Commissioned 1919, scrapped 1930

Sources

• http://www.fleetsubmarine.com/sublist.html