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).
Summary of clutch tests concluding the unit for the large bore Bentley is more durable and proposing a larger version for the 20/25 chassis.
| Identifier | ExFiles\Box 85\2\ scan0203 | |
| Date | 19th November 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}G/KW.19.11.35. Therefore, summarising the results obtained. A clutch is a portion of a car which, if abused sufficiently, can always be destroyed; therefore it is impossible to claim complete immunity from trouble. However, as far as can be ascertained from our tests, the clutch to be fitted to the large bore Bentley is more durable than any previously fitted to the car. It is certainly lighter, less costly, and gives a smoother engines than the unit it replaces. We propose to fit the next larger size to the big bore 20/25, a car which is 20% heavier than the Bentley and on which performance must be subservient to durability. Chassis GLC-5 when returned to Eg. will be so equipped. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Att: Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}8/KW.16.8.35. | ||