Blueprint diagram illustrating a failure where a sheared pin allowed a stud to unscrew.
| Identifier | ExFiles\Box 83\4\ scan0007 | |
| Date | 18th October 1935 guessed | |
| X 204- THIS NUT WAS UP TO THE END OF THE THREAD. THIS PIN HAD BEEN SHEARED ALLOWING THE STUD TO UNSCREW. | ||
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).