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).
Suggestions to increase the flexibility of the Phantom III Clutch Coupling Shaft to overcome a vibration issue.
| Identifier | ExFiles\Box 93\3\ scan0171 | |
| Date | 24th September 1936 | |
| GRY{Shadwell Grylls}, Please follow this up. Rm{William Robotham - Chief Engineer} x312 C.E. Da.{Bernard Day - Chassis Design} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} TMG. E/HDY.{William Hardy}1/HP.24.9.36. Phantom III Clutch Coupling Shaft. We send herewith N.Sch.4908 showing two suggestions for increasing the flexibility of the metal plate joint between the clutch coupling shaft and the gearbox to overcome a vibration which Mx.{John H Maddocks - Chief Proving Officer} has found is caused by the present joint when out of truth. Both schemes should be tried Would RHC.{R. H. Coverley - Production Engineer} kindly test both types for stiffness, as was done for the present coupling. Will you also kindly order for trial a Hardy Spicer fabric disc for the front end of the shaft 5/8" thickness, but otherwise the same as the present disc excepting that the hole in the disc may be 76 m/m as given by Hardy Spicer as an existing mould size for a 203 m/m disc in a rather old catalogue which we have. E/HDY.{William Hardy} N.Sch.4908 herewith. | ||