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).
Spring bump tests, detailing issues with violent bouncing at high speeds and difficulties with road testing due to weather.
| Identifier | ExFiles\Box 20\2\ Scan060 | |
| Date | 31th January 1920 | |
| Contd. -3- Hs{Lord Ernest Hives - Chair}1/LG31.1.20. It is necessary for us to confirm the results on the bump test because it is noticeable that with the split springs that up to a certain speed they behave very well; it is at high speeds that the bouncing becomes violent. It may happen that after we run the solid springs at a bit higher speed they may get bad also. We are going to try this. The weather at present makes it practically impossible to carry out any reliable tests on the road because the car over a bumpy road slides and skids. We think, however, that we are doing quite right in stopping splitting any more springs. The springs we used on our pre-war chassis were very rigid laterally, they not only had the solid bottom leaf but the second leaf extended right to the end of the clip, clipping the leaves together so much closer to the end of the spring. Hs.{Lord Ernest Hives - Chair} (inverted text at bottom) H & S (B) (C) (T) Ltd. A (100) V S S M H 2460 | ||