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The diesel engine in a 688 class can be quickly started by compressed air during emergencies or to evacuate noxious (nonvolatile) gases from the boat, although 'ventilation' requires raising a snorkel mast. During nonemergency situations, design constraints call for operators to allow the engine to reach normal operating temperatures before it ...
USS Los Angeles (SSN-688), lead ship of her class of submarines, was the fourth ship of the United States Navy to be named for Los Angeles, California.The contract to build her was awarded to Newport News Shipbuilding and Dry Dock Company in Newport News, Virginia on 8 January 1971 and her keel was laid down on 8 January 1972.
The petrol engine produces 727 bhp (542 kW) at 7,200 rpm with an additional 176 bhp (131 kW) from the electric motor. At 4,000 rpm the engine is said to produce 720 N⋅m (531 lb⋅ft) of torque while the electric motor can produce a maximum of 260 N⋅m (192 lb⋅ft) from 0 rpm upwards.
The engine made its official debut at the Geneva Motor Show in the new 1962 Renault Floride S, replacing the 845 cc (0.8 L) 40 PS (29 kW; 39 hp) Dauphine Gordini. The 956 cc (1.0 L) capacity, which delivered a dozen additional horsepower, (51 PS (38 kW; 50 hp) SAE ), a few months later was seen in the new R8 sedan.
The Pratt & Whitney Canada PT6 is a turboprop aircraft engine produced by Pratt & Whitney Canada.Its design was started in 1958, it first ran in February 1960, first flew on 30 May 1961, entered service in 1964, and has been continuously updated since.