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).
The 'SS' Bumper Chassis testing on a bumping rig, detailing front spring life with new hydraulics and shock dampers.
| Identifier | ExFiles\Box 119\2\ scan0321 | |
| Date | 1st January 1929 | |
| To DA.{Bernard Day - Chassis Design} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 48772 Hs{Lord Ernest Hives - Chair}/RmL/LG11.1.29. c. to BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} 'SS{S. Smith}' BUMPER CHASSIS. x8772 x7410 x735 Attached herewith is a complete report on the running of the SS.{S. Smith} chassis on the bumping rig. You will note that the front spring life has been quite satisfactory when run with shock dampers. The new hydraulics with restrictions apparently have a very marked effect on spring life. We want the shock absorbers to stand up with 5 dynamic restrictions because it is the condition which gives us the best car control and steering. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||