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).
Oil consumption issues related to piston design and testing.
| Identifier | ExFiles\Box 180\M3\M3.1\ img015 | |
| Date | 19th May 1925 | |
| R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs{Lord Ernest Hives - Chair}7/LG19.5.25. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} HY.{Tom Haldenby - Plant Engineer} c. to W'or. E.A.C. OIL CONSUMPTION. X8980 We have tested the pistons which are fitted with a scraper ring at the bottom of the piston skirt. All the rings were of the plain type. It will be seen from the appended curves that this piston does not overcome our over-oiling trouble. We are next trying these pistons with that part of the skirt below the lower scraper, turned away to allow free air release for the oil below the scraper. Hs.{Lord Ernest Hives - Chair} | ||