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).
Induction and exhaust pipe designs for Super Sports models.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 26 | |
| Date | 24th January 1928 | |
| E.{Mr Elliott - Chief Engineer}) FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair}) (At Le CanadelHenry Royce's French residence.) BY.{R.W. Bailey - Chief Engineer}) S. TO BJ. WCR. RG.{Mr Rowledge} BA. re. SUPER SPORTS. GAS PASSAGES & PIPES. R1/M21.1.28. REC'D.{John DeLooze - Company Secretary} & DESPATCHED FROM WW. 24.1.28. X8070 X8230 X8080 X8992 You will see that the passages I had sketched are like those you shew in red on your blueprint, so they are probably the best. I like the look of your short underfed induction pipe, if this will do as well as the less neat type with longer connection and top feed. There are reasons for each being superior - for instance, over the top might be better cold, while underfed might get the greater power warm: worth rigging up both. I send also sketches of two types of exhaust pipes as I understand we schemed them to suit the present ideas. I have added the one Mercedes have adopted, but it depends so much upon what suits the conditions: should like to try all three. It occurred to me that your turbulent head might be improved if we could put the sparking plugs at each end. It is to be regretted that we have no single cylinder arrangement that we could try this, but some day we may. I am making some progress with the straight through carburetter, but it is difficult without proper drawings. I conclude you are doing very little with this item, and we are waiting for Derby to see what they want at full speed, full throttle. X8992 Dodd and I are still very pleased with EAC.7. - power, smoothness, riding, steering, starter, all seem definite improvements, wonderful when it gets on a piece of decent road, requires more care with the throttle or pulls ones head about. I feel between Derby and Wittering we are getting good progress, and am anxious to get along quickly to receive some benefit before it is too late. (Three pages of sketches attached.) R.{Sir Henry Royce} [STAMP] RECEIVED W.W. 25 JAN 1928 | ||