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).
Results of torsion tests on front springs.
| Identifier | ExFiles\Box 42\3\ Scan200 | |
| Date | 10th August 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} 13854 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG10.8.26. TORSION TESTS - FRONT SPRINGS. 13854 74429 We have carried out a considerable number of tests to determine the relative resistance to torsion of various road springs. On the whole these tests have not been very successful because the springs do not behave very consistently. We have, however, proved that :- (a) The shackle angle does not make an appreciable difference to a springs torsional strength. We tried various angles but could detect no alteration in the springs behaviour. (b) The increase in length of the springs for front wheel brakes is not sufficient to make the longer spring appreciably more rigid in torsion. (c) That off-setting the spring by a small amount is not so important as the direction of load application i.e. whether the load is applied towards the shackle or away from the shackle. It appears that we can improve the torque resisting properties of our front springs by 10% by shackling at the rear. The results of the Woodhead spring are not very convincing as regards its torsional strength, though it would appear to be better than standard if shackled at the rear. Another point in favour of shackling at the rear is the slightly increased riding comfort that we have measured. Hs{Lord Ernest Hives - Chair}/W.A.Robotham. | ||