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).
Bump rig testing of a new design for chassis rear springs, noting failures and improved bedding.
| Identifier | WestWitteringFiles\E\June1920\ Scan15 | |
| Date | 16th June 1920 | |
| R.R. 199 (250T) (SD676 19-7-17) MP180865 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to C. c. to CN.{Mr Chamberain} c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} EFC ORIGINAL. sent out 21.6.20. 4 Hs{Lord Ernest Hives - Chair}1/LG16.6.20. X.3981. RE CHASSIS REAR SPRINGS. X.1331 X.3923 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 12 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 these springs 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 springs to fit on to running cars. One pair is being fitted to 6.EX Car. Hs.{Lord Ernest Hives - Chair} E C JUN 21 1920 RECEIVED. | ||