R-Class Specifications
Lead Boat: SS-78, U.S.S. R-1
Length: 186′
Beam: 18′
Draft: 15′ 6″ (Surface trim)
Displacement: 574 tons (surfaced); 685 tons (submerged)
Speed: 12.5 knots (surfaced); 9.3 knots (submerged)
Diving Depth: 200′ (test depth)
Range: 4,700 miles @ 6.2 knots
Crew: 4 officers; 3 CPO; 26 enlisted
Deck Gun: 1-3″/50-caliber
Anti-Aircraft Weapons: Machine guns
Torpedoes: 4-21″ torpedo tubes (bow), 8 torpedoes
Engines: 2 diesel, direct drive
Motors: 2 DC motor/generators
Sonar: Hydrophones only
| Hull Number | Name | Commission | Fate | Class |
|---|---|---|---|---|
| SS-78 | R-1 | 1918 | Scrapped 1946 | R-Class |
| SS-79 | R-2 | 1919 | Scrapped 1945 | R-Class |
| SS-80 | R-3 | 1919 | Scrapped 1948 | R-Class |
| SS-81 | R-4 | 1919 | Scrapped 1946 | R-Class |
| SS-82 | R-5 | 1919 | Scrapped 1946 | R-Class |
| SS-83 | R-6 | 1919 | Scrapped 1946 | R-Class |
| SS-86 | R-9 | 1919 | Scrapped 1946 | R-Class |
| SS-87 | R-10 | 1919 | Scrapped 1946 | R-Class |
| SS-88 | R-11 | 1919 | Scrapped 1946 | R-Class |
| SS-89 | R-12 | 1919 | Lost June 1943 | R-Class |
| SS-90 | R-13 | 1919 | Scrapped 1946 | R-Class |
| SS-91 | R-14 | 1919 | Scrapped 1945 | R-Class |
| SS-92 | R-15 | 1919 | Scrapped 1946 | R-Class |
| SS-93 | R-16 | 1919 | Scrapped 1946 | R-Class |
| SS-94 | R-17 | 1918 | Scrapped 1945 | R-Class |
| SS-95 | R-18 | 1918 | Scrapped 1946 | R-Class |
| SS-96 | R-19 | 1918 | To U.K., lost in collision June 1942 | R-Class |
| SS-97 | R-20 | 1919 | Scrapped 1946 | R-Class |