Use of rectangular piston rings on the SS chassis and monitoring for over-oiling.
| Identifier | ExFiles\Box 16\1\ Scan216 | |
| Date | 17th January 1929 | |
| HS. {Lord Ernest Hives - Chair} X741 C. BYGS. BY12/G.17.1.29. PISTON RINGS. On the SS. {S. Smith} chassis so far we have instructed purely rectangular rings. We would like you to watch whether over-oiling is evident or not, as on the Phantom so far we have not been able to use a purely rectangular ring. Mx. {John H Maddocks - Chief Proving Officer} has tried it on three separate occasions but in each case he has had to carry on with a ring having a scraping feature.. At present we are using a rectangular ring bevelled. BY. {R.W. Bailey - Chief Engineer} By | ||
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).