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).
Instruction to experimentally modify the 'SS' chassis brakes by changing the servo cams and increasing the length of lever G.76811.
| Identifier | ExFiles\Box 16\3\ Scan026 | |
| Date | 17th December 1928 | |
| 47370 To BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}6/LG17.12.28. 47420 'SS{S. Smith}' BRAKES. Will you please instruct [struck through text] the SS.{S. Smith} chassis to be made experimentally to have 30° cams on the servo and the length of lever G.76811 to be increased by 25% i.e., the new length of lever will be 1.725 instead of the old length of 1.375. We have discussed the matter with DA.{Bernard Day - Chassis Design} and this alteration is necessary to make the brakes reasonably efficient until we can get some further scheme through. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||