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).
Different designs for shock absorbers and their performance.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan081 | |
| Date | 16th June 1930 | |
| DA.{Bernard Day - Chassis Design} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/MJ.16.6.30. x 5520 x 7520 SHOCK ABSORBERS. With reference to Dal/M14.6.30. We reported on the air vessels of the shock absorber in Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/MJ.23.5.30. You will recollect that we have had three separate attempts at providing free movement in the centre shock absorber stroke. Firstly, by the somewhat elaborate spring controlled valve in the centre of the piston. Secondly, by the air vessels, and thirdly, by the spring loaded links. In each case we have run into axle 'dither' when braking, and have impaired the road holding qualities on the car. We are convinced that undamped movement in the centre of the stroke does not give us such good results as the American method of providing a slight leak in the valve. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||