From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The performance and design of various engine types, including two-stroke and diesel units.
| Identifier | ExFiles\Box 133\3\ scan0059 | |
| Date | 3rd March 1939 | |
| -6- The general feel and behaviour of the power unit was very poor. It was rough at all speeds and loads, performance was down, and the unit hunted badly at tick-over. The exhaust, however, did appear clean under all conditions. (b) Two-strokes. A considerable amount of work is being carried out on two-strokes, of sleeve valve types, single poppet exhaust valve and cylinder inlet ports and petrol injection. They are making a three-cylinder poppet valve exhaust engine with beam drive to the overhead camshaft, dynamo, blower and oil pump from the crankshaft. The blower appears to be of the reciprocating piston type, but very little information was obtained on this part of the job. (c) Bearings. These were not discussed to any extent, but a good combination was said to be a lead bronze top half in conjunction with a white metal bottom half. (d) Other Units. Mr. Pitchford has recently returned from the States, and says that the Americans know very little about Diesel engines as they are still learning the job. The Hanomag & Peugeot units were said to be very poor, whilst the Oberhausli had a very bad low speed torque. Gardners they considered about the best British D.I. engine. (e) High Power Diesel. They considered our version of a side-valve exhaust, overhead inlet Diesel would be only suitable for a slow speed engine, due to the restrictions to gas flow offered by the throat. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||