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 specifications for a road spring, detailing Mr. Royce's requirements.
| Identifier | ExFiles\Box 49\3\ Scan025 | |
| Date | 2nd February 1921 | |
| Contd. -4- E2/G2.2.21. The thickness of the road spring shewn on N. scheme 727 Mr. Royce does nott wish to use, and he hopes that you will be able to reduce it by using leaves having not such a great variation in thickness, and by taking advan-tage of the longer spring with the wider leaves. He would like you to calculate a spring on the lines of LeC.1341, but with the leaf thickness only varied three times for the working leaves, in steps of, say .010" He would also like load, stress, and deflection diagrams given for the spring, with perhaps and illsutration, as mentioned in item (5), shewing the leaves in the position of no stress, just previous to squeezing together. In short, Mr. Royce thinks that the size of the spring given on LeC.1341 is about right for the maximum, but the particulars still re-quire working out, and that unless we can keep down the amount of primary set and variation in leaf thickness to the minimum, we shall get a thick heavy spring. E.{Mr Elliott - Chief Engineer} | ||