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).
Graph comparing oil consumption at 3/4 full load for different piston and ring configurations on an E.A.C. Engine V Series.
| Identifier | ExFiles\Box 180\M3\M3.1\ img002 | |
| Date | 31th March 1925 | |
| E.A.C. ENGINE V SERIES OIL CONSUMPTION AT 3/4 FULL LOAD 31/3/25 OIL CONSUMPTION. PTS PER HOUR 4 3 2 1 0 R.P.M. 2000 2250 2500 2750 OLD TYPE STD PISTONS WITH STD RINGS & SCRAPER LATEST PISTONS (PISTONS E 73407) & STD RINGS (RINGS E 73287-91) PISTONS E 73273 RINGS E 73287-91 OLD TYPE PISTONS WITH L SECTION RINGS | ||