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).
Test results for various servo linings on the 25 HP model.
| Identifier | ExFiles\Box 105\4\ scan0094 | |
| Date | 7th September 1932 | |
| X5370. FILES. ------- 7.9 .32. ------- 25 HP. SERVO. ----------- Tests were conducted on various servo linings to ascertain which was the most consistent servo lining, and which had the minimum variation between hot and cold. Results show that the standard lining has a fairly small variation between hot and cold, and that the small lining radially woven with the selvedge edge has considerably less variation though in the normal running condition unimpregnated cotton duck has only about 15% less efficiency. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||