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).
Cylinder bore wear, piston design, and the effects of superchargers and carburetters.
| Identifier | ExFiles\Box 132\5\ scan0027 | |
| Date | 18th January 1939 | |
| 1124? 3 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} from Rm.{William Robotham - Chief Engineer} c. CTS.{C. Trot Salt - Carburation} Rm{William Robotham - Chief Engineer}7/R.18.1.39. CYLINDER BORE WEAR. We should like a summary of the work done during the past 12 months on cylinder bore wear, both in the Cold Chamber and on the Test Bed. It occurs to us that when we have a supercharger fitted to the rig engine it might be a means of putting some load on the engine after each start in order to increase the cylinder wall temperature, and so follow Helmore's theory that corrosion will take place if we get enough cylinder wall temperature. With regard to pistsons, we decided that the split skirt pistons were better for cylinder bore wear than the aerolite, and, in consequence, had a split skirt design. We now seem to have got the wrong sort of knob on this piston. Will you please arrange to get the R.R. piston with the raised crown to be brought in line with the aerolite, and endurance run as soon as possible. We are asking Hancock whether there is any measure-able increase in cylinder bore wear since the Stromberg car-buretter was introduced. We are anxious to get the short inserted liners tested as soon as possible. Rm.{William Robotham - Chief Engineer} | ||