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 of oil consumption test bench results for an E.A.C. engine, comparing pistons with scraper rings to standard pistons with plain rings.
| Identifier | Morton\M3.1\ img012 | |
| Date | 19th May 1925 | |
| OIL CONSUMPTION CURVES FOR E.A.C. ENGINE. TEST BENCH RESULTS. OIL CONSUMPTION. PTS/HOUR. 5 4 3 2 1 0 R.P.M. 2000 2500 2750 PISTONS WITH SCRAPER RING AT BOTTOM OF SKIRT. AVERAGE STANDARD WITH PLAIN RINGS. AC4/25 | ||