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).
Improvements to the Phantom and Sports Car clutch.
| Identifier | ExFiles\Box 66\4\ scan0087 | |
| Date | 13th September 1927 | |
| Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to BJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to BY.{R.W. Bailey - Chief Engineer} +8830D R2/M13.9.27. NEXT 10,000 MILES PHANTOM X. 8770 X. 8300 AND SPORTS CAR - CLUTCH. X. 8940b. X. 8774 Mr. Hardy has sent you today some improvements - (1) To delete some parts which were included in Mr. Stent's application of the serrated coupling during my absence in France, and some minor improvements to lighten and simplify. (2) More important is the increase in the clutch brake to make quicker changes possible. The Phantom clutch has always been considered too slow in coming to rest: proportionately the clutch brake is much less, even though the clutch driven part has between two and three times less inertia than the Silver Ghost. We are now getting it fairly simple, and have reduced its weight twice. For the coming high speed work it should be all steel (i.e. no cast iron rims). R.{Sir Henry Royce} | ||