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).
Blueprint diagram illustrating the failure points of a cut-out ring.
| Identifier | ExFiles\Box 92\2\ scan0065 | |
| Date | 11th January 1930 | |
| Cut-Out Ring Failure (E79544). V 768 Melted Here Cracks & Nearly Melted. JWB 11-1-30 | ||