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).
Methodology for testing vehicle springs, comparing oscillation versus gradual loading.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan158 | |
| Date | 27th May 1926 | |
| Contd. -2- Hs{Lord Ernest Hives - Chair}/RmL/T27.5.26. readings taken. The agreement between various clip adjustments, ostensibly supposed to be the same as far as possible when pulled up by the same individual, is indicated in Graph 9. The majority of the tests were conducted by allowing the spring to oscillate under the given load, the reading being taken after the spring had come to rest. This method gave the most consistent results as it eliminated the personal factor of load application. However, tests were also taken (Graphs 7 & 8) to shew the difference occasioned when the spring was loaded gradually. For a spring with a large amount of internal friction gradual loading might be the better method; with our present standard springs, however, for 1" range beyond the static position there is practically no difference between the two sets of readings. The main object of the test was to determine the mean rating of the spring from "un-loaded" to "normal loaded" camber, and to compare this with the subsequent mean rating of the spring during 1" working deflection past the "static load" position. This was to prove the contention that two springs may have the same initial deflection, and yet the riding comfort may be different due to the ratings of the springs after normal load differing due to the method of attaching the spring or supporting the axle. Contd. | ||