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).
Page 2 of a design specification memo discussing auxiliary pumps and a standard single-cylinder unit.
| Identifier | ExFiles\Box 134\1\ scan0243 | |
| Date | 23th April 1940 | |
| - 2 - Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}3/GH.23.4.40. Continued:- (h) An auxiliary drive should be provided to allow a fuel pump to be fitted if required. 2 or 4-stroke requirements could probably be met by modifications to the pump. (i) The coolant pump should be driven from a separate variable speed electric motor, or flow could be controlled by means of stop valves, using a constant speed motor. (j) A similar separate drive should be provided for the oil pump, only to obtain varying oil flows, it will probably be necessary to provide a variable speed motor. (k) A standard B.80 single cylinder unit should be designed to fit on this top half crankcase. It is essential that when designing this unit, connecting rod, piston, cylinder, cylinder head and valve gear should be exact duplicates of the parts employed on the standard engine and as far as is possible main engine parts should actually be used. This standard unit is necessary in view of the fact that single cylinder results are of an essentially comparative nature and absolute figures are of very little use. We would strongly deprecate any suggestion to utilise parts of the old single cylinder unit as this engine was worn out and giving continuous trouble. Also the attempt to adapt existing parts to a new design introduces artificial and unnecessary limitations. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||