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).
Experiments on engine compression ratios, torque reactions, and carburettor improvements for the SS engine.
| Identifier | ExFiles\Box 14\5\ Scan025 | |
| Date | 17th October 1928 | |
| E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} X7005 R1/M17.10.28. EAC.10. (SS{S. Smith}) RE. COMPRESSION. X.790 X.7080 X.7005 X.7771 In our experiments we should use the highest compression that the engine will bear without detonations (say 5 to 1.) (1) as a clean engine, and poor petrol. (2) as a carboned engine, and good petrol. We must then find out a way of preventing the torque re-actions reaching the body. We are expecting some improvement from the EAC.10 chassis because of the 4 engine feet with hard rubber forward, and soft rubber under rear feet (which will require a support under gearbox). It is not use working the other way. I understand that we have made very little progress in B.HP. with the SS.{S. Smith} engine if we continue to use present Phantom carburetter, but I cannot believe these will not stand some enlargement of throats and ports. I have also asked many times if we cannot get some improvement from two carbs. - i.e. two 3 cyls. as in F.{Mr Friese}, with carburetters in the vee. We must get along with this engine and complete chassis; every day of delay is of importance. R.{Sir Henry Royce} | ||