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 of road springs, including plate ends, clips, and types like cantilever and semi-elliptic.
| Identifier | ExFiles\Box 42\3\ Scan220 | |
| Date | 2nd October 1928 | |
| BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} from DA.{Bernard Day - Chassis Design} 43854 DA{Bernard Day - Chassis Design}3/M2.10.28. ROAD SPRINGS. X.3854 X.7410 X.8410 R.{Sir Henry Royce} agrees to returning to the Woodhead clip in order to get the ends of the spring plates as flexible as possible. He thinks however that the square end should be better than the pointed end, and we are sending herewith a sketch shewing the shape of the end of the plates which will probably increase the bearing. We notice that on the rear springs, which have a considerable length of overhang on each plate, that there appears to be room for the riveted on clip, and still space for quite a flexible end. There is a difference between the cantilever and the semi elliptic spring, and the end of the each plate of the latter having to carry approximately only half the load of the former, though the movement is probably approx. double. We are not quite sure whether this should give an advantage to the semi-elliptic springs or not, but it looks as though it might do so. It appears for instance that it would be easier to lubricate the more lightly loaded spring. DA.{Bernard Day - Chassis Design} | ||