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).
Conclusion on the cause of wheel wobbles being an out-of-balance force from insufficiently accurate wheel balancing.
| Identifier | ExFiles\Box 53\2\ Scan171 | |
| Date | 15th September 1925 guessed | |
| contd :- -2- We conclude that the reason why we have always measured wobbles whose period coincides with that of the road wheel is because we cannot balance the wheels sufficiently accurately and therefore we always have an out of balance force which starts the wobbles at a given road speed. Yours faithfully, | ||