Photograph showing the condition of upper and lower halves of main bearings after use.
| Identifier | ExFiles\Box 97\4\ scan0186 | |
| Date | 23th November 1938 guessed | |
| ← 1 TO 7 → UPPER HALVES II 6.B.IV. (B.IV). MAIN BEARINGS. HOYTS Z3 W/M. AFTER 15,545 MILES IN FRANCE R.R.56 SHIMS 2 HOLES IN EACH JOURNAL | ||
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).