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).
Instructions for a stress test on a front shackle of rear springs to understand failure points.
| Identifier | ExFiles\Box 78\2\ scan0066 | |
| Date | 29th May 1912 | |
| [Handwritten in left margin]: X6524 Breaking failures [Typed text]: Mr Platford. 29.5.12. Re front shackle of rear springs. TBB7/L29512. With reference to Mr Royce's note dated May 16th, will you please test a front shackle of rear springs as follows :- 1. Twist the shackle just beyond the elastic limit both ways by means of parallel bars inserted in the link. 2. Hold the large boss firmly (to represent a tight fit on the overhanging pin of the shackle) and bend the links backwards and forwards until they break. By comparing the fractures with shackles which have actually failed we shall know what has caused the failure. | ||