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).
Technical note on the S.S. Suspension, detailing its springs, lubrication, and handling characteristics compared to the Phantom model.
| Identifier | ExFiles\Box 14\5\ Scan138 | |
| Date | 18th September 1929 | |
| To Hm.{Capt. W. Hallam - Head Repairs} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} For Depot Sheet. X7005 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 2/WJ.18.9.29. S.S. SUSPENSION. X7005 X P005 The S.S. springs have slightly more deflection front and rear than the Phantom. Inaddition, the top four leaves of each spring both front and rear have oil conveyed to the tips of the leaves from the centre point oiling system. The lubrication of springs in this manner prevents spring squeaks. These are almost invariably caused by the top leave s becoming dry. Additionally however, it maintains for an indefinite period, the soft riding qualities which at present we only get when a Phantom spring has been freshly lubricated. The springs are also protested against corrosion as previously, by Cadmium plating. It will be clear that owing to the lubricated condition of the spring leaves, their internal friction has been reduced. Therefore, it is essential that the shock absorbers shall function correctly or the car will not hold the road well at speeds and the axles will dither when the brakes are applied. The reduction in the internal spring friction enables the car to be sprung to the requirements of a customer who uses the car extensively at low speeds. Previously we have always found these conditions most difficult to satisfy. In order to make the best of the altered | ||