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).
Letter responding to an inquiry about a patent carburetor/vacuum silencer and engine compression ratios.
| Identifier | ExFiles\Box 79\2\ scan0095 | |
| Date | 2nd February 1921 | |
| R.R. 235a (100T) (S.H 798. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 X 3352 EFC Ans Tweddell RECEIVED. EFC FEB 9 1921 Reference - DA{Bernard Day - Chassis Design}4/CB2-2-21. Feb: 2nd, 1921. R.{Sir Henry Royce} Anderson Esq., 54 Church Street, EGREMONT, LIVERPOOL. Dear Sir, Re Patent Carb: Jector - Vacuum Silencer. In reply to your last letter. If we are in Blackpool in the near future we will call and inspect your car. We will let you know beforehand, the time of our arrival. We have heard from your Mr Hunter, but have not been, as yet, able to fix up for the loan of a silencer. With reference to your inquiry regarding the highest compression used on a petrol aeroplane, or car engine, the highest which we are aware of, is 6.2 to 1, though it is possible that this has been slightly exceeded. None of our engines are made with anything like this compression. Yours faithfully, FOR ROLLS ROYCE LIMITED. | ||