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).
Efficacy of multi-ringed pistons in holding back oil compared to pistons with fewer rings, and their potential use in inverted engines.
| Identifier | ExFiles\Box 77\2\ scan0156 | |
| Date | 15th June 1917 guessed | |
| R.R. A 235 (400 T) (S.C. 536. 15 2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. X.2369. E7/B25.C.17. To EH. from E.{Mr Elliott - Chief Engineer} X.2209. X.2369. X.2809. RE MULTI-RINGED PISTONS AND OILING UP. WE note your remarks re the above question, but would lik to know your opinion regarding the efficacy of the multi-ring ed{J. L. Edwards} piston in holding back oil relatively to the piston with the smaller number of rings. X.601. 'If you try with Lodge plugs in each case, and cut out other factors, it would appear possible to obtain a comparison of the two types. We are interested in the multi-ringed piston not only with relation to exsisting types of engine, but also for use on the inverted engine. Perhaps you would kindly read your last report on this matter EH2/AT15617 in connection with this memo. Although the plugs were oiling. E.{Mr Elliott - Chief Engineer} | ||