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).
Sketch of a flanged component with a crack annotated as having gone completely around the part.
| Identifier | ExFiles\Box 5a\2\ 02-page093 | |
| Date | 9th January 1928 | |
| cracked completely round ayhyB 9/1/28 | ||