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).
Trouble with the Bentley and 25 HP servo and proposing a modification to make it run cooler.
| Identifier | ExFiles\Box 105\4\ scan0153 | |
| Date | 2nd November 1934 | |
| 25370 To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}13/KW.2.11.34. Bentley and 25 HP. Servo. We are having a considerable amount of trouble in the Bentley servo due to the coefficient of friction of the lining materials falling when the servo becomes hot. We therefore wish to try the modified servo shown on the attached Hs.{Lord Ernest Hives - Chair}1589 which we think will run cooler on the car. Will you please detail the modification to suit a "Direct to rear only" servo incorporating Spring Ring Torsional Connection to GL.{G. Linnett}713 and Ball Bearing Bridge to N.Sch.3927, and construct one servo and fit to Bentley chassis B-23-AE. This chassis is already fitted with a Ball Bearing Bridge, so that the only new parts required are the two pressure plates, the servo drum, and the spring ring mechanism. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||