*British, Post WW2, Unidentified Porpoise Class Submarine – Original Photograph with Crown Copyright*
Original Photograph of Post WW2 Submarine – likely Porpoise Class, at HMS Osprey, Portland. This photograph originally formed part of the Lou Britton British Submarine Collection, which was acquired by the Royal Navy Submarine Museum, Gosport in 2007.
Approximate Dimensions: 25.3cm x 20.3cm
Stamped on the reverse: “Crown Copyright Reserved. Negatives 26904. Photograph S… HMS Osprey, Portland.” On the front: The gangway in the photograph says “Portland 31 x 3. Do not use after July 1979”
HMS Osprey was an anti-submarine training establishment located at the Isle of Portland, Dorset, England. It was active between 1924 and 1941, and again from 1946 to 1999.
The Porpoise class was the first operational submarine class built for the Royal Navy after World War II. Designed based on lessons learned from studying German Type XXI U-boats and British wartime experiments with the modified Seraph, which featured streamlined designs and a larger battery.
Measuring 290 feet 3 inches (88.47 m) overall and 241 feet (73.46 m) between perpendiculars, the Porpoise-class submarines had a beam of 26 feet 6 inches (8.08 m) and a draught of 18 feet 3 inches (5.56 m). Their displacement was 1,565 long tons (1,590 t) standard and 1,975 long tons (2,007 t) when surfaced, rising to 2,303 long tons (2,340 t) submerged. Propulsion was powered by two Admiralty Standard Range diesel generators producing a total of 3,680 brake horsepower (2,740 kW), which could either charge the batteries or drive the submarine’s electric motors. These motors, rated at 6,000 shaft horsepower (4,500 kW), powered two shafts, allowing a surface speed of 12 knots (14 mph; 22 km/h) and a submerged speed of 16 knots (18 mph; 30 km/h). The submarines were equipped with eight 21-inch (533 mm) torpedo tubes—six in the bow and two in the stern—carrying up to 30 torpedoes, initially comprising the unguided Mark 8 and the homing Mark 20 torpedoes.
*Condition*
Excellent used condition. Please see photographs as part of the condition report.
RQMAOXAH_4848195368
