Perch class submarine
General characteristics
Type: Diesel-electric submarine
Displacement:Surfaced: 2,300–2,350 tons
Submerged: 3,000-3,950 tons full load
Length: 236ft 6 in (72 m)
Beam: 32 ft 10 in (10.0 m)
Draft: 23 ft 10 in (7.0 m)
Propulsion:
1 × diesel engine driving 1 x electrical generator (Fairbanks-Morse or General Motors);
3 × 126-cell Sargo batteries driving 1 × low-speed electric motor (Elliott Company or General Electric) on one shaft
5,400 shp (4,000 kW) surfaced or snorting on diesels
2,740 shp (2,040 kW) submerged on the battery
Speed:
20.25 knots (38 km/h) surfaced,
17.5 knots (32 km/h) submerged (2 hours)
Range:11,000 nautical miles (20,000 km) surfaced @ 10 knots (19 km/h)
Endurance: 48 hours @ 4 knots (7.5 km/h) submerged, 75 days on patrol
Test depth: 400 ft (120 m): Max. safe 800 ft (240 m)
Complement: 8 officers, 50-60 enlisted men
Armament:
4 × 21.65 in (55 cm) torpedo tubes forward, 24 torpedoes or 48 mines
1 × 15 cm (5.9 im) / 25 caliber disappearing deck gun. (50 rounds)
Various Hotchkiss machine guns fitted on pintle mounts for AAA defense.