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).
Reporting on the failure of a new design of thick leaf rear springs during bump rig testing.
| Identifier | ExFiles\Box 80\2\ scan0293 | |
| Date | 21th June 1920 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to Bn.{W.O. Bentley / Mr Barrington} c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c.to By.{R.W. Bailey - Chief Engineer} x3981 sent out 21.6.20. Hsl/LG16.6.20. X.3981. RE CHASSIS REAR SPRINGS. X.3923. X.1331. We have been running on the bump rig a pair of rear springs of the thick leaf type to the latest design. The leaves are tapering in thickness at the end and are parallel except for a large radius at the corner. The 4th. leaf on the N.S. cracked after k2 hours running. The crack occurred under the shackle clip. After 17 hours running the O.S. spring was found to have the fourth, fifth and second leaves broken under the shackle clip. These springs have not lasted the length of time they should do but before we come to any conclusions we are testing another pair. We find that the bedding on thesensprings is very much better than we had before. There is no signs of the plates digging into each other. We are ordering half-a-dozen sets of these spring to fit on to running cars. One pair is being fitted to 6.EX Car. Hs.{Lord Ernest Hives - Chair} | ||