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).
Cause and potential remedy for brake juddering on Bentley cars.
| Identifier | ExFiles\Box 84\2\ scan0105 | |
| Date | 23th February 1934 | |
| To-E.{Mr Elliott - Chief Engineer} from Da.{Bernard Day - Chassis Design} c. Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} GRY{Shadwell Grylls} x206 Da.{Bernard Day - Chassis Design}3/HP.23.2.34. Bentley Brakes - Juddering. ------------------------- An examination of the 3 cars - Phantoms, 20/25 and Bentley, side by side, seems to indicate that the juddering complained of is the result of the very much more flexible front axle on the Bentley, between the axle control and the wheel. We understand that it is impossible to make the Phantom judder, not easy to make the 20/25, and difficult to prevent the Bentley doing it. This is in agreement with the relative apparent torsional stiffness of the three axles. It looks as though the only permanent remedy for this trouble on the Bentley is to increase considerably the torsional stiffness of the front axle, even at the expense of some weight. There appears to be room to do this. An increase of torsional stiffness could be gained by moving the axle control connecting rod out towards the wheel, to do which there also seems to be room. Da.{Bernard Day - Chassis Design} | ||