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).
Technical memorandum discussing the design, fitting, and oil retention for a servo shaft.
| Identifier | ExFiles\Box 73\1\ scan0122 | |
| Date | 19th March 1924 | |
| To DA.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} c. to E.{Mr Elliott - Chief Engineer} RG.{Mr Rowledge} HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} S E C R E T. R1/M19.3.24. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. X.9910 X.9770 RE. B.Sch.1767 - Your date 11.3.24. SERVO SHAFT. I prefer the lower scheme as a cleaner simpler and less costly job. I shew modifications to the washer for better oil retaining. I do not think we should require any making up pieces, if so have a selection of tubes. There is really no such thing as a light driving fit: the parts must be O.K. if they only slide on or they need a cone fit - (slide these on). The nut and the shaft should be larger if convenient so as to give larger split pin. It might be thought O.K. to tighten the whole column by that nut without fussing over end dimensions to just get a clearance. N.sch.1768 - Seems O.K. The chief trouble I can see is that of retaining the oil. Mr. Elliott and I have been rather inclined to a washer, thus :- SEE ORIGINAL FOR SKETCH. I should just treat the worm wheel as a sliding fit on a parallel serrated 4 or 6 key shaft. a free fit with a ground bore. R.{Sir Henry Royce} | ||