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).
Transmission vibration issues, specifically 'Coronation Rattles', in the 20/25 and Silver Ghost models.
| Identifier | ExFiles\Box 104\4\ scan0117 | |
| Date | 21th April 1932 | |
| Hs.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} C. R.{Sir Henry Royce} Wor.{Arthur Wormald - General Works Manager} Sg.{Arthur F. Sidgreaves - MD} x 5310 EPL0/H21.4.32. X.634 X.5310 re. 20/25 - TRANSMISSION VIBRATION. With reference to R1/M14.4.32, my recollection of the "Coronation Rattles" is that they were cured by the fixing of the damped spring coupling. True, the removal of the central brake drum removed transmission groan periods, but they were of a different species. The later Silver Ghosts suffered from "Coronation rattles" (solid engine coupling) and was cured by the fixing of the fabric coupling between the engine and gear box. It would appear therefore that a fabric coupling is indicated. EP.{G. Eric Platford - Chief Quality Engineer} | ||