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).
Removing the distributor cam on Bentley and 20/25 HP cars, warning against bending the spindle by using a screwdriver.
| Identifier | ExFiles\Box 155\4\ scan0130 | |
| Date | 12th June 1936 | |
| To By.{R.W. Bailey - Chief Engineer} c. to E.{Mr Elliott - Chief Engineer} c. to Mx.{John H Maddocks - Chief Proving Officer} c. to Hd.{Mr Hayward/Mr Huddy} c. to K.{Mr Kilner} c. to P. (Sp.{Mr Spinney}) X 1326 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}12/KW.12.6.36. Removing Distributor Cam on Bentley and 20/25 HP. Cars. As we have previously pointed out, if this cam is removed with a screwdriver it is very easy to bend the spindle on which it is mounted. If this spindle is bent, the cam then runs eccentrically, which means that the difference in timing between one cylinder and another can be as much as 6° on the flywheel. This variation is sufficient to set up bad detonation. The material of the spindle and the cam has recently been improved, but we still think it is imperative that proper cam extractors should be used at all Depots. At one time many of these were in existence, but we believe at the present moment there is only one in the factory. Will By.{R.W. Bailey - Chief Engineer} please arrange for the necessary parts to be made, and instructions to be issued that these are to be used. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||