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).
Letter discussing the mechanical causes of 'juddering' during deceleration.
| Identifier | ExFiles\Box 27\3\ Scan069 | |
| Date | 31th March 1939 guessed | |
| In decelerating, I imagine, the possible points where jerking can arise are between the brake linings and the drum and, again, between the tyres and the ground. I do not see clearly how the clutch could be responsible for 'juddering' when decelerating — or does the engine actually run faster than the wheels allow it, when the brakes are suddenly applied, and cause a jerky slipping movement in the clutch! — I really do not know if this can happen in a car; but if it cannot, what is 'juddering' in the case of deceleration? I hope you won't mind being troubled further about this word. I always like to find out the exact meaning; and while I have no doubt but that what you say in your letter is correct, I think other things are also called 'juddering'! If my imperfect knowledge of cars is leading me to see difficulties where there aren't any, I hope you will believe that I am not deliberately making stupid difficulties. yours sincerely, J.{Mr Johnson W.M.} M.{Mr Moon / Mr Moore} Wyllie | ||