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).
Testing of Phantom III cylinder liners made from 'High Phosphorous iron' against standard Sheepbridge liners.
| Identifier | ExFiles\Box 93\4\ scan0135 | |
| Date | 13th May 1938 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 319' Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}3/MH.{M. Huckerby}13.5.38. PHANTOM III CYLINDER LINERS. Two cylinder liners have been submitted to us as produced by R.R. in "High Phosphorous iron" which we wish to compare with the Standard Sheepbridge liners in the following way. The liners to be housed on a steel plate in the same way as they are in the unit. A steel cover plate be used to clamp them down using the normal C and A head joint. By an attachment at the base of the liners to be joggled to the extent of .005 - .010 at as high a frequency as possible, with the rig comparable with the R.P.M. of an engine and the piston loading on the liner. The top flange is the weak mechanism point of the liners when operating in a unit hence the request for the above comparison. Regarding the actual liners the 2 R.R. high phosphorus type will be supplied by Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}, the top and underside also the outside diameter of the flange and the spigot portion require final grinding, and the standard Sheepbridge liners should be drawn from production. The above test result is urgently required as dependent upon this the High Phosphorus R.R. produced liners will be standardised if satisfactory. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||