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).
High compression cylinder head and a tappet silencing scheme from Hispano.
| Identifier | ExFiles\Box 27a\1\ Scan197 | |
| Date | 31th December 1934 | |
| W/P - Sr. x4013 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/KW.31.12.34: High Compression Cylinder Head. Thanks for your note of the 29th. I attach some information on the high compression cylinder head. Before we fit it to your demonstration car I should very much like to have confirmatory evidence of its performance on 21-G-IV. Additionally it would be of considerable help if Hancock could run three or four thousand miles on it. I wonder whether you could manage this without upsetting Poberejsky. Anyhow, let me know. Best wishes for 1935, and let me know if any of the Dunwoody's are coming to Europe, because they must come and see us. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} I understand that Hispanos have a special scheme for silencing their tappets, which consists of a double tappet cover, the outer part of which is lined with felt or other insulating material. I shall be very glad if you will let me have particulars of this, and actually if in your opinion it is any good, it would be worth obtaining the parts and sending them over. | ||