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 strength of special rear springs for the 117-MC Summers car, noting they are stronger than required.
| Identifier | ExFiles\Box 67a\1\ scan0241 | |
| Date | 21th August 1926 | |
| To BY/SS.{S. Smith} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} x8410 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG21.8.26. 117-MC - SUMMERS CAR. x4117 X8410 With reference to the special rear springs which were ordered for 117-MC car. We attach details of the buffer clearances obtained with these springs, submitted by the R.D. It will be observed from the buffer clearances that these springs are rather more than 15% stronger than we require as the specified buffer clearance was 3.5" with 4 passengers. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||