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 the condition of used C.15 (25/30) unit main bearings after testing.
| Identifier | ExFiles\Box 97\1\ scan0034 | |
| Date | 27th November 1936 guessed | |
| UPPER HALVES 13 <- 1 TO 7 -> C.15 (25/30) UNIT MAIN BEARINGS STANDARD WHITE METAL.HAVE DONE SAME BED RUNNING AS BIG ENDS. NO ROAD RUNNING. | ||