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).
Friction issues in the 20 HP column and proposing a design change using L-shaped plates.
| Identifier | WestWitteringFiles\Q\2-July1927-September1927\ 33 | |
| Date | 10th August 1927 | |
| To DA.{Bernard Day - Chassis Design} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG10.8.27. 20 HP. FRICTION IN THE COLUMN. Y5430 The main difficulty with the present design is that it is almost impossible to fit the driving and driven plates so that they move freely under the spring pressure and yet have no % slack. In consequence they are fitted up with a small amount of slack which originally is hardly appreciable but which becomes very noticeable at the steering wheel radius in a short time due to the small area of the splines. Would it be possible to decrease the number of outer serrations and increase the area of both inner and outer splines by adopting L shaped plates? We asked Hs.{Lord Ernest Hives - Chair} to draw your attention to this point six weeks ago but very probably he forgot. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||