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 durability, oil consumption, and the testing of different cylinder liners.
| Identifier | ExFiles\Box 132\4\ scan0092 | |
| Date | 27th October 1937 | |
| File Cylinder Wear 1124 By.{R.W. Bailey - Chief Engineer} from RM.{William Robotham - Chief Engineer} c. HS.{Lord Ernest Hives - Chair} c. E.{Mr Elliott - Chief Engineer} c. Rg.{Mr Rowledge} c. RMC. c. Da.{Bernard Day - Chassis Design} c. Lr.{Mr Ellor} RM{William Robotham - Chief Engineer}5/R.27.10.37. CYLINDER BORE DURABILITY. We have accepted the fact that one of our most important objectives is to make our cars more durable than less expensive products. We, therefore, keep one unit test bed permanently allotted to the question of cylinder bore wear, and the co-related subject of oil consumption. So far our information on cylinder bore wear is still very incomplete. The attached report, however, shows that we have covered a good deal of ground on oil consumption. To get accurate oil consumption figures it is necessary to make many repeat tests, and, consequently, results are not obtained quickly. We are fortunate in having both Wraith and P.III units available for test purposes with loose liners, and shortly we hope to be able to issue a report showing the relative durability of our own cylinder iron when compared with the best materials known in the trade to-day. According to Leylands, A.E.C. and other Commercial Vehicle Manufacturers, we should be able to reduce cylinder bore wear by more than 50% by the adoption of Phosphor-Chrome liners. The fact that oil consumption does not necessarily follow viscosity is curious, and naturally cannot be accepted without further confirmatory tests. The Cold Chamber will be an asset in accelerating results on cylinder bore wear. RM.{William Robotham - Chief Engineer} | ||