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).
Discrepancy in 40/50 suspension test results related to shock dampers and tyre pressures.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan088 | |
| Date | 9th October 1928 | |
| HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} ORIGINAL DA{Bernard Day - Chassis Design}1/M10.9.28. 40/50 SUSPENSION. YS8440 x 8520 X235 With reference to HS{Lord Ernest Hives - Chair}/RM{William Robotham - Chief Engineer}1/LG6928., there seems something of a discrepancy between the result of test No. 1. and test No. 5. On No. 1. we see that disconnecting the front shock dampers improved the riding to 45 on the scale, and dropping the front tyre pressures 15 lbs. in test No. 5. improved the riding to 20. This seems a very great difference compared with the effect of the tyre pressure indicated in test No. 2. It would seem as though a very high velocity effect in the front shock dampers, and little static pressure, would be an advantage, but we are not sure whether the velocities on this low speed riding are comparable with the velocity during a high speed wobble. DA.{Bernard Day - Chassis Design} | ||