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 of a cut-out ring, showing areas of melting and cracking.
| Identifier | ExFiles\Box 14\6\ Scan139 | |
| Date | 11th March 1930 | |
| CUT-OUT RING FAILURE -(E79544). V 768 MELTED HERE CRACKS & NEARLY MELTED. WRD 11-3-30 | ||