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).
Causes of fender shake and high-speed wobble on drums.
| Identifier | ExFiles\Box 170\2\ img009 | |
| Date | 11th February 1931 guessed | |
| -2- With regard to fender shake on the drums we do not get this unless we definitely put bumps on the drums because you cannot promote a high speed wobble on smooth drums with our car in its standard condition i.e. hydraulics are too much for it. Therefore there was not much difference between dry and wet drums because actual blows were causing the fender shake and not the twisting of the tyre on the drum. Yours sincerely, | ||