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).
Confidential memo confirming an instruction to bore out an existing 16 HP 4-Cylinder Silver Ripple engine casting.
| Identifier | ExFiles\Box 118\1\ scan0399 | |
| Date | 15th January 1944 | |
| 1022 Confidential. To: Wym.{G. Harold Whyman - Experimental Manager} from Rm.{William Robotham - Chief Engineer} Rn.{Mr Robinson} 5/h.{Arthur M. Hanbury - Head Complaints} 15.1.44 16 H.P. 4- CYLINDER ENGINE. This is to confirm that you will take one of the existing castings of the Silver Ripple engine and see if you can open it out to 3¼" bore without breaking through. If it comes out satisfactorily, we should like one of these crankcases and blocks machined as soon as possible. Rm.{William Robotham - Chief Engineer} | ||