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).
Sticking ball drain valves, a remote drain on the Wraith, and relief valve springs for a Phantom III.
| Identifier | ExFiles\Box 131\2\ scan0234 | |
| Date | 12th July 1938 | |
| W/K.{Mr Kilner} To Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 1113 γ Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}7/MH.{M. Huckerby}12.7.38. We thank you for your memos giving information on sticking of ball drain valves on the 25/30 h.p. and are looking into this job as to incorporating the remote drain on the Wraith. Regarding the relief valve springs which I supplied you for trial on Ph.III where the hydraulic rockers are converted to the solid type to cut down the oil supply, instructions are being issued to include this on the Depot Sheet for the conversion. To confirm my memory on the springs I gave you, were they all the same type and all you have done is to substitue the existing low pressure spring by one of those I handed you and that you do not touch the high pressure valve at all ? Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||