Rolls-Royce C6NFLH
| Rolls-Royce C6SFL | |
|---|---|
| Overview | |
| Manufacturer | Rolls-Royce Limited |
| Combustion chamber | |
| Configuration | Six-cylinder, supercharged diesel |
| Displacement | 12.17 litres (740 cu in) |
| Cylinder bore | 5 1/8 inch (130 mm) |
| Piston stroke | 6 inch (152 mm) |
| Combustion | |
| Fuel type | Diesel |
| Oil system | dry sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 190 brake horsepower (140 kW) at 1,800 rpm |
| Torque output | 600 lb·ft (810 N·m) at 1,300 rpm |
The Rolls-Royce C range was a series of in-line 4, 6 and 8 cylinder diesel engines used in small railway locomotives, construction vehicles, marine and similar applications. They were manufactured by the Rolls-Royce Oil Engine Division, initially at Derby and later at Shrewsbury, from the 1950s through to 1970s.
Although officially termed the C range, they were best known for the most common C6SFL six-cylinder variant. Most had an output of around 200 bhp, with 233 bhp for the final models. Their construction was a conventional water-cooled vertical inline 6 four-stroke diesel engine of 12.17 litres (743 cu in). Most were supercharged by a Roots blower, but there were also variants with a turbocharger or normally aspirated.
A later addition to the range was the SF65C model. This was a lower-rated version of the C range 6-cylinder engine and shared many of the advantages of the range's component rationalisation. It was available in normally aspirated or turbocharged variants, and both industrial and marine versions were available.
Data from Version supplied for the Vickers-Armstrong crawler tractor
The engine was constructed around a monobloc cylinder and crankcase casting. Unusually, this was available in either cast iron or aluminium alloy. The cylinders were replaceable wet liners, with pumped water cooling. Valves were single OHV exhaust and inlet valves. Seven bearings with cross-bolted caps supported the nitrided crankshaft. The fuel injection system was direct, into a toroidal combustion chamber within the aluminium pistons. Supercharging was by a Roots blower driven at twice crankshaft speed, for a boost pressure of 8 psi.
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