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).
Suggested modifications to the P.2. clutch for the 10,000 mile car.
| Identifier | ExFiles\Box 13\7\ 07-page155 | |
| Date | 28th December 1933 | |
| GRY{Shadwell Grylls} See me To BY.{R.W. Bailey - Chief Engineer} from Da.{Bernard Day - Chassis Design} Da.{Bernard Day - Chassis Design}3/HP.28.12.33. c. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Hey. X 7300 P.2. Clutch. ---------- Herewith is N. Sch.3925 showing the suggested modifications to the P.2. clutch for the 10,000 mile car. (1) Needle bearings in the operating levers. [This line has been struck through] (2) Increased friction surface. The two pressure plates are already in M.S. and the back one is the existing piece except for the respacing of the rivet holes to suit the wider friction surfaces. The pressure per square inch on the surfaces has been dropped from approximately 32 lbs.sq.in. to approximately 27 lbs sq.in. In addition we have suggested that the easy engagement springs instead of being 10% of the original springs, as now, should be made 20% of the present springs, in accordance with R's latest practice. In this connection we may mention that N. Sch.3551, showing a clutch with increased friction surfaces made largely from existing pieces, has been in existence for about 15 months, but has never we believe been tried. It has the additional advantage of enabling the inertia of the inner member to be reduced a little compared with standard. Da.{Bernard Day - Chassis Design} | ||