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 design, comparing square-ended plates with stiffer ends and referencing various design schemes.
| Identifier | ExFiles\Box 49\3\ Scan043 | |
| Date | 16th March 1921 | |
| DAL/CB16-3-21 contd. account in the manner shewn on "N" Scheme 787. For the actual spring that we are proposing we have therefore suggested that an end which is stiffer than the beam which has circular bending shall be used, and from previous examples worked out we know that the difference between the results from this end, and the results from a spring which has perfectly square-ended plates, is practically insignificant. We have therefore suggested as on "N" Scheme 779, that for practical purposes it is sufficient to work out the springs as though they had square ended plates. However, if it were found necessary to have greatly tapering ends in order to reduce squeaking, or for any other reason, then we should have to use "N" Scheme 786. On "N" Scheme 789 is shewn a somewhat modified form of "N" Scheme 771, by which means the rear spring shewn on "N" Scheme 788 was built up in the first case. Since we have set out this information we have acquired some additional knowledge which will probably result in our being able to simplify the work of designing a spring, and also enable us to get nearer the correct result without so much trial and error. When this information is completer we will send it on to you. DA.{Bernard Day - Chassis Design} R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. | ||