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).
Page discussing the efficiency and oil consumption of 'L' shaped piston rings.
| Identifier | ExFiles\Box 71\4\ scan0124 | |
| Date | 1st April 1925 | |
| R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT -2- Expl. No. REF: Hs{Lord Ernest Hives - Chair}4/LGS.4.25. can say conclusively whether this is correct. We are still keeping one car running fitted with 'L' shaped rings. The instance we reported of the 'L' shaped rings reducing their efficiency we found was due to the oil consumption of the engine increasing as a whole because when the standard rings were put back, we found that the oil consumption was still so much higher compared with the original tests with the standard rings. Hs.{Lord Ernest Hives - Chair} | ||