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).
Adjustment of the steering pivot lean angle and its effects.
| Identifier | ExFiles\Box 2\12\ B002_X168-page252 | |
| Date | 15th November 1915 | |
| C O P Y. To Wor.{Arthur Wormald - General Works Manager} for EH. from R.{Sir Henry Royce} 17/11/15 Copies to J.{Mr Johnson W.M.} By.{R.W. Bailey - Chief Engineer} Wa.{Mr Wallis} COPY R6/B151115. November 15th 1915. Re Lean of Steering Pivots. When asking for the steering pivot lean to be increased to 2º I was not aware that I had increased it to practically the same amount as it used to be, as 1º50 mins. and 2º are very nearly alike. I therefore think we had better be contented with 1º30 mins. instead of the 50 mins. on 49 GB. You did not, however, reply to my other point in which the raising of the back of the car was equal to decreasing the rake of the pivots. How much this is accounted for I do not know, but it may be that the 1º30 mins. will be about right if the back end of the car usually runs a little higher. I quite agree to your getting an experiment run on the bumping rig, if possible, but I think it would be necessary to find out at what speed the steering wobbles occured. I quite think the right thing to do is to get central steering as near as possible. F.H.R. | ||