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).
Test results on cylinder bores of low Brinell hardness.
| Identifier | ExFiles\Box 132\4\ scan0087 | |
| Date | 28th September 1937 | |
| By.{R.W. Bailey - Chief Engineer} from Rm.{William Robotham - Chief Engineer} c. Hs.{Lord Ernest Hives - Chair} c. Ds. c. MX.{John H Maddocks - Chief Proving Officer} Rm{William Robotham - Chief Engineer}10/R.28.9.37. CYLINDER BORES OF LOW BRINELL. We have been running tests on a cylinder block of low brinell with a view to checking up the desirability, or otherwise, of this procedure. The attached report from Matthews indicates the result so far obtained. We have no simple explanation as to why the cylinder bore wear should be so exceedingly good. It should, however, be noted that this car does not do a great deal of traffic work. We do seem to be getting a sensible picture of the piston ring combination which gives reasonably good results. Now that we have the integral cylinder block for Wraith, all the results should be directly applicable to this car. Rm.{William Robotham - Chief Engineer} | ||