Power & Performance
Those special qualities that separate one sea-going vessel design from another. Performance specifications presented assume optimal operating conditions for USS Porpoise (SS-172).
1935: 4 x Winton Model 16-201A 16-cylinder, 2-cycle, diesel-fueled engines developing 1,300 shaft horsepower; 2 x 120-cell Exide VL31B batteries driving 4 x Elliott electric motors at 1,075 shaft horsepower; 1942 REFIT: 4 x General Motors 2-cycle Model 12-278A diesel engines developing 1,200 horsepower; 2 x Shafts.
Propulsion
19.0 kts
21.9 mph
Surface Speed
8.0 kts
9.2 mph
Submerged Speed
5,996 nm
6,900 miles | 11,104 km
Range