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).
Use of 20% stiffer chassis springs for cars in Australia.
| Identifier | ExFiles\Box 72\2\ scan0014 | |
| Date | 24th June 1927 | |
| X8990 To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} c. to BJ. Hs.{Lord Ernest Hives - Chair} R4/M24.6.27. RE. CHASSIS SPRINGS FOR AUSTRALIA. X. 8990 X. 8410 X. 3900 In reply to your BY11/H22.6.27., I consider that 20% stiffer springs are the maximum stiffness that we should fit to any car. If these were our standard stock of springs, their normal position would give an increased camber, and therefore increased rubber buffer clearance. The car would then ride with its maximum load about the same position as the normal load. We can choose between using the normal buffers, and risking the spring breakage, or using increased depth of rubber buffer so as to make the shock on striking the buffer less felt in the car. This latter arrangement is preferable and would save the springs from breaking. Every care should be taken that the springs sent out are so graded in the length of the plate that the stresses throughout the length of the leaves are the same. OY. says this is not the case with the ordinary Sheffield made springs, and that they have corrected it in those they have manufactured themselves at Springfield. R.{Sir Henry Royce} | ||