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).
Fitting and experimental application of driver-controlled hydraulic shock dampers.
| Identifier | WestWitteringFiles\V\March1931-September1931\ Scan274 | |
| Date | 24th June 1931 | |
| HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} C. to SG.{Arthur F. Sidgreaves - MD} BY.{R.W. Bailey - Chief Engineer} ORIGINAL HYDRAULIC SHOCK DAMPERS CONTROLLED FROM DRIVER'S SEAT. X235 x7520. x5520. With reference to HS{Lord Ernest Hives - Chair}/RM{William Robotham - Chief Engineer}2/KT13631., we should like to point out that you have had a scheme for fitting the shock damper with distant control to the rear end of the chassis since the beginning of Jan. of this year - namely N. sch. 3192. This arrangement is shewn in combination with the sling to limit the rebound of the rear axle and we think it would be quite suitable to try it in this way. As however it demands a certain amount of alteration to the brake gear we suggest that you might prefer to fit a longer lever to the shock damper, namely 12" instead of 10", and employ exactly the arrangement used on EAC. 7., namely N. sch.2324. The shock damper on N. sch. 3192. would require moving forward by the amount the lever is lengthened, and the sheet metal brackets attaching it to the frame might be correspondingly shortened. we do not consider that this needs a scheme from us and suggest that you should rig it up in this way if you prefer. As regards the control we understood from HS.{Lord Ernest Hives - Chair} that he is prepared to provide experimentally a temporary scheme. We have not been able to apply this damper to the front of the chassis but we suggest that this could also be done temporarily and experimentally by turning the shock damper to the front and altering the shackling of the spring so as to put the fixed point at the front. Since it is intended with the cheap edition of the shock damper to mount it at the front the results obtained by this experiment would not be entirely wasted. Arranged in this way the lever can be 10" long without needing a special spring joint. As the lever already made is 10" long this could be used for the front by modifying the setting. DA.{Bernard Day - Chassis Design} | ||