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The CL class is a class of diesel locomotives built by Clyde Engineering, Granville for the Commonwealth Railways in several batches between 1970 and 1972. The class was the last in the world to be built with the Electro-Motive Diesel bulldog nose but differed from previous builds in having a mansard roof .
The fact that they were primarily intended for services on the arduous Calder Valley route meant that Class 110 needed more power than other first generation DMUs, so they were fitted with 180 hp (130 kW) Rolls-Royce C6NFLH engines, and when delivered they had the highest hp/ton of any of the first generation DMUs, including the lightweights.
Wheels coupled to the main/side rods, through which the power developed in the cylinders (24) is transformed into tractive power at the rails. [1] [2] [5] [3]: 28 The weight of bearings and coupling rods on the driving wheels is counterbalanced with cast-in weights to reduce "hammering" on the track when the locomotive is under way. [3]: 21
The new 110 engine embodies the same advanced principles of high-speed, two-cycle design as the 71 series, of which more than 45,000,000 horsepower have been produced by Detroit Diesel since 1937. The horsepower rating of 275 hp (205 kW) at 1800 r.p.m. is attained with a b.m.e.p. of 92 lb (42 kg) per square inch.
An indicator chart records the pressure in the cylinder versus the volume swept by the piston, throughout the two or four strokes of the piston which constitute the engine, or compressor, cycle. The indicator diagram is used to calculate the work done and the power produced in an engine cylinder [2] or used in a compressor cylinder.
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CL-109 28 February 1944 — — — Construction cancelled 12 August 1945 and scrapped on slip Buffalo CL-110 2 April 1944 Wilmington CL-111 William Cramp & Sons Shipbuilding Company, Philadelphia, Pennsylvania: 5 March 1945 Vallejo CL-112 New York Shipbuilding Corporation, Camden, New Jersey — — — — Construction cancelled 5 October ...
These locomotives had a trouble-free introduction in comparison to several of the other Standard classes and were used interchangeably with the pre-nationalisation class 5 engines they supplemented. They were utilised as the haulage power on duties varying from fast passenger trains to slow unfitted freight trains, displaying their versatility.