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).
The failure of a lever in a 20 HP front hydraulic shock damper, with a proposed solution.
| Identifier | ExFiles\Box 4\9\ 09-page240 | |
| Date | 26th May 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to BJ. RG.{Mr Rowledge} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} Ha. c. to Nor. X5860a Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/L64. 5. 26. HYDRAULIC SHOCK DAMPERS. V235 We have had a report from France this morning saying that the lever in one of the 20 HP. front shock dampers has failed as shown in the attached sketch. Although we have run shock dampers considerably more than 100 hrs. on the bump test here, we have never previously had a lever fail in this manner. We conclude that the retaining bolt stretched, causing first of all the fracture of the bolt then the failure of the lever. As it appears that the loading on the rear shock dampers will put a greater strain on this lever than when these are run on the front, we are strengthening up the lever and bolt as far as possible and in addition making the locking of the nut positive. Hs{Lord Ernest Hives - Chair}/W. A.{Mr Adams} Robotham. | ||