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).
Potential design improvements for spring shackles, including using tight bushes with deep flanges.
| Identifier | ExFiles\Box 49\3\ Scan168 | |
| Date | 4th December 1922 | |
| To Hs. {Lord Ernest Hives - Chair} from Da. {Bernard Day - Chassis Design} V4261 Da {Bernard Day - Chassis Design} 2/M4.12.22. RE. SPRING SHACKLES X.2628. X.4261. We are still not quite sure whether the Expl: Dept: have any definite recommendations to make as regards these shackles. We understand that in view of the experience on the steering pivots and other parts the number of small grooves at one time tried is not now favoured. We are contemplating using bushes tight in the spring and in the shackle with deep flanges. This would avoid the wear of the unhardened shackle and only slightly hardened spring which one supposes occurs with a floating bush, but since the hardened steel washers would still be required it absorbs a certain amount of room which we cannot easily spare, especially on the shackle at the rear end of the front spring. Of course we ultimately intend to close the shackles in as far as possible but this proposal is a little way off we think. Da. {Bernard Day - Chassis Design} | ||