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The Fairbanks-Morse 38 8-1/8 is a diesel engine of the two-stroke, opposed-piston type. [1] It was developed in the 1930s, and is similar in arrangement to a contemporary series of German Bombers aircraft diesels. [2]
While on the surface or at snorkel depth, the submarine may use the submarine's auxiliary or emergency diesel generator for power or ventilation [30] [31] (e.g., following a fire). [32] The diesel engine in a 688 class can be quickly started by compressed air during emergencies or to evacuate noxious (non volatile ) gases from the boat ...
The Cleveland Diesel Model 268 inline diesel was used as an auxiliary engine in many fleet submarines and as emergency backup generators on larger warships. They also found use in commercial applications. The 8-cylinder, in-line, 2-cycle, air starting engine, rated at 300KW generator output at 1200 rpm.
The first submarine in the class, Sōryū, was launched on 5 December 2007 and delivered to the navy in March 2009. The eleventh of the class is the first one that is equipped with lithium-ion batteries without a Stirling engine. [16] This submarine may have a range from AIP of 6500 nautical miles and can remain submerged for 40 days. [6]
A unique design under project SCB 245, [4] Narwhal was her own class. Forward of the reactor compartment she was broadly similar to the contemporary Sturgeon-class submarines, but with a slightly larger diameter and the relocation of the auxiliary diesel generator from the bow compartment to the auxiliary machine room in the operations compartment.
That analysis led [1] to four goals—increasing the submarines' battery capacity, streamlining the boats' structures, adding snorkels, and improving fire control systems. The navy immediately focused on designing a new class of submarine, but the Bureau of Ships believed the fleet of existing Gato , Balao , and Tench -class submarines could be ...
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The submarines are powered by a CAS-48 pressurised water nuclear reactor creating 48 megawatts utilising 7% low-enriched uranium, [4] driving two 3,950-kilowatt turbo-alternator sets. These power a single propeller creating 7,100 kW (9,500 shp). [5] At low speeds, the submarines use natural circulation to reduce noise emissions.