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).
Engine minutes and suggesting improvements to frame and suspension damping.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan012 | |
| Date | 4th March 1929 guessed | |
| SS{S. Smith} engine minute (2) I am suggesting here that we find the periodicity of the frame front end, and if we can make this out of step with the axle. which I believe is generally understood to be between 600 & 900 per minute we cannot expect to do much more. I am also suggesting that we test the value of an elastic vertical suspension. (horizontal rubber) and instead of rubber on the vertical sides of the frame we fit brake lining material spring load the surfaces so as to give vertical damping to vertical motion & no horizontal flexing That is I am suggesting friction damping in parallel. with flexible mounting. I have suggested much more rigid front feet than rear, because it is less liable for the vibration to reach the body & scuttle dash from the front feet than the rear. This & the exhaust will have to be a compromise in the end, it is always so, 188X is very good though probably not so good as you have, perhaps it is remarkably good body. Kindly type out & distribute R | ||