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).
Connecting inner clutch plates by a spring ring and comparing figures with a Lincoln single plate clutch.
| Identifier | ExFiles\Box 93\3\ scan0002 | |
| Date | 17th February 1934 | |
| - 2 - Da.{Bernard Day - Chassis Design}2/HP.17.2.34. The two inner plates are connected by large diameter serrations and do not need to bend. In this connection we have a scheme for connecting the two plates by a spring ring, on the lines of the two plate servo which we recently suggested and which is said to be a success. The figures which Rm.{William Robotham - Chief Engineer} gives for the Lincoln single plate clutch are of course not possible. The min. pedal pressure would be 142 lbs and even with 4" of pedal movement 34 lbs. Probably the clearance movement is much less than given, but the coefficient of friction on these figures is .236 which we have never been able to obtain. Da.{Bernard Day - Chassis Design} | ||