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 piston after a scuffing test with a report on the results.
| Identifier | ExFiles\Box 148\3\ scan0324 | |
| Date | 20th 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 "RUN IN" ON MOBILOIL "A" "DE LAVAL" OIL FOR TOTAL OF 7 HRS. & AFTERWARDS COMPLETING NORMAL SCUFFING TEST ON MOBILOIL ARCTIC OIL. PISTON SHOWS NO SIGNS OF SCUFFING. | ||