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).
Modifications to the rocker shaft and arm for the 25-30 and Bentley models.
| Identifier | ExFiles\Box 106\5\ scan0153 | |
| Date | 6th February 1936 | |
| +554 GRY{Shadwell Grylls} FWDL on top? c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Da.{Bernard Day - Chassis Design} E/JNR.{Charles L. Jenner}2/HP.6.2.36. re 25-30 and Bentley. We send you herewith:- LeC.4979 showing a modification to the rocker shaft and rocker. Mx.{John H Maddocks - Chief Proving Officer} has demonstrated that the hole in the rocker shaft supplying the rocker must be in the same direction as the hole supplying the tappet end so that there will be no excess of oil to the valve end of the rocker. It will be noticed that we have modified the drilling in the rocker arm to make sure that it breaks out into the annulus because we notice on some of those being made that this hole is very inaccurate in position. LeC.4939 herewith. E/JNR.{Charles L. Jenner} | ||