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).
Clutch jaggering on Bentley 4 1/4 Litre & 25/30 HP models and the recommended fitting of a propeller shaft damper.
| Identifier | ExFiles\Box 85\2\ scan0272 | |
| Date | 13th August 1936 | |
| To Hd.{Mr Hayward/Mr Huddy} (FOR DEPOT SHEET.) Hs{Lord Ernest Hives - Chair}/Smth.8/JH.13.8.36. Clutch - Bentley 4 1/4 Litre & 25/30 HP. Further to Hs{Lord Ernest Hives - Chair}/Smth.18/KW.13.7.36. As described in the above memo, the clutch is often said to be jaggering when the take-up is accompanied by violent transmission rattles, but otherwise feels to be smooth. In such cases the fitting of a propellor shaft damper will probably cure the trouble. The damper to be fitted is the standard 20/25 and 3 1/2 Litre Bentley one, which was discarded when we changed over to the Borg & Beck clutch. The damper can be fitted directly to the 25/30 chassis as the flange at the front end of the propellor shaft has been machined to take it. In the case of the 4 1/4 Litre Bentley, the flange is not suitable, and either a 25/30 sliding piece or a complete 3 1/2 Litre Bentley propellor shaft has to be fitted. The 4 1/4 Litre Bentley and 25/30 sliding pieces are identical except for the flange. Hs{Lord Ernest Hives - Chair}/Smth. | ||