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).
Photograph showing a scuffed piston after a piston scuffing test.
| Identifier | ExFiles\Box 148\3\ scan0321 | |
| Date | 5th April 1938 guessed | |
| PISTON SCUFFING TESTS. STANDARD E.60632 PISTON (NOT TIN-PLATED). E.60820 COMPRESSION RING. E.61123 "L" SECTION RING. E.60821 SCRAPER RING. PISTON SCUFFED AFTER ONE WITH CASTROL "XL" OIL. TESTS CONSISTED OF :- 30 MINS. AT IDLING SPEED (WARMING UP FROM COLD). 3 HRS. AT 1500 R.P.M. LIGHT LOAD (NORMAL WARMING JACKET TEMP. 75° - 80°). | ||