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).
Design and improvement of road springs.
| Identifier | ExFiles\Box 72\3\ scan0095 | |
| Date | 29th August 1924 | |
| V9410 SECRET. R2/M29.8.24. To RG.{Mr Rowledge} HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to CJ. BJ. DA.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} RE. VISIT OF RG.{Mr Rowledge} & HS.{Lord Ernest Hives - Chair} TO WW. ON 27TH. & 28 TH. INST. X. 9410 ROAD SPRINGS. Firths attempt to avoid Woodhead patent is really bad. Both in scheme and design, and carrying out, we do not agree. Is there any need for 4 clips per spring? Let us have Woodhead design, or failing that, let us rivet the cross plate to the end of the springs blade as in the older design. Let us leave the top plate so that it shall have the minimum stress and range of stress. Test slightly thicker, and slightly thinner: if rebound is greater than bump, then upper plate should have slightly more camber than at rest. Can we gain life by using more carefully graded or thinner lower leaves? More steel in the spring should give longer life if it can be efficiently used in the parts that break. Centre bolt and clip have been greatly improved over the old and crude design, but I remember that at Le CanadelHenry Royce's French residence owing to bad fitting central bolt broke and came away leaving scheme useless. R.{Sir Henry Royce} | ||