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).
Issues and potential improvements for clutch and servo linings.
| Identifier | ExFiles\Box 26\4\ Scan249 | |
| Date | 19th February 1924 | |
| To Hs.{Lord Ernest Hives - Chair} St.{Capt. P. R. Strong} RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} DA{Bernard Day - Chassis Design} ) FROM R.{Sir Henry Royce} 4388 c. to CJ. PN.{Mr Northey} BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} SECRET. R4/M19.2.24. EAC. CLUTCH AND SERVO LININGS. X.4388 X.9300 X.9480 Can we not try the other makes of non-metallic liner for slow speed servo and clutch friction surface - (Scandinavian etc.) Sorry we made the EAC. clutch so heavy in the plate. We ought to have known better, but were anxious to get the design excellent and did not give time to calculations. Naturally try the plate with various degrees of thinness. Lauro, the mechanic with PN.{Mr Northey} says when oil hot clutch never stops, but it seems free. Be sure friction surface becomes clear and nowhere is rubbing, or unnecessary end pressure. Then does the gearbox internal friction exceed the ball bearings friction carrying central plate. Anyway it is not at all bad, and might be worse if we alter it by a clutch brake. I think we should first make it very light and very free. I do not think duralumin would do, but it is easy to try. My feeling is that we shall like best the disc of ferodo (ring) with duralumin sheets for centre, or thin sheet steel, the ferodo ring being rivetted between 2 sheet metal centre discs so as to get the attachment as far from the centre as possible. Get particulars of Hispano if not already obtained. R.{Sir Henry Royce} | ||