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 modification of hydraulic shock dampers on the rear of a vehicle.
| Identifier | ExFiles\Box 72\1\ scan0239 | |
| Date | 7th June 1926 | |
| To BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design} c. to BJ. Hs.{Lord Ernest Hives - Chair} *X9520 DA{Bernard Day - Chassis Design}4/M6. 7. 26. EAC.1. HYDRAULIC SHOCK DAMPERS ON REAR. X.8920 X.235 X.9520 We have looked into the question of fitting hydraulic shock dampers to the rear of the above car in conjunction with your F.75246. We do not like the position of the lever and connecting rod shewn on that drawing, which does not seem very effective, and furthermore, the use of a 13" lever appears to be working the shock damper to the full limits inside the cyl. bore, which we have tried to avoid hitherto. We also do not care for the modifications to the brake gear, and on N.Sch.2223 herewith we shew how the existing arrangement of brake gear could be retained by pushing it further in towards the centre of the car. We believe that there is nothing in the petrol tank which prevents us doing this. It is intended to use a 13" lever on the EAC.7 arrangement of which we shall be sending you particulars in the course of a few days, but since this involves a new shock damper body and we expect that you wish to get the shock dampers on EAC.1. as soon as possible, we have taken the existing body and used a 14 1/4" lever giving us a margin at either end of the stroke. We are asking for a longer brake operating shaft, and slight modifications to the flanged hub of the axle tube for carrying the brackets. We have also arranged the lower spring pad forging to take the shock damper ball end. With reference to the modifications to the brake equaliser gear, and to the intermediate lever on the third cross member we agree to what you shew on F.75246., as we have retained the line of the brake ropes you shew on that drawing. DA.{Bernard Day - Chassis Design} | ||