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).
Design and potential cost reduction of a new rear axle, with a cost comparison requested against the Corniche axle.
| Identifier | ExFiles\Box 114\1\ scan0232 | |
| Date | 21th July 1939 | |
| 1015 & 1260 To RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. Hs.{Lord Ernest Hives - Chair} c. Ey. c. Da.{Bernard Day - Chassis Design} c. Da{Bernard Day - Chassis Design}/Hdy.{William Hardy} c. By/Ald.{F. Allwood - Experimental Design} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}5/MH.{M. Huckerby}21.7.39. REAR AXLES. Herewith prints SCD.1453 sheets 1 and 2, showing an 8 1/2" crown wheel semi-floating axle designed to be as simple as possible. It may be regarded as a modification of OL.887 (the Corniche axle) with everything possible omitted and the machining of the remaining pieces simplified where possible. Various alternatives are shown, but for a preliminary cost comparison we suggest working on the bottom half of the drawing with the oil seals omitted. The crown wheel mounting is provided by an A.C ball bearing and double lipped roller bearing. The differential boxes can be either malleable castings or S/M forgings which ever is cheaper. Two pinion bearing housings are shown and again we leave the choice to you. The wheel bearing end is simplified by the use of a self-sealing bearing obtainable at 5/10. It has also been suggested that the two parts of the differential box could be a single casting. This means that the diff. pinions must have spherical seals or assembly is impossible. We should like your views on the cost of this suggestion. The reason that scheme SCD.1453 has been made is to discover how much cost reduction can be achieved by design improvements. Will you, therefore, let us have a cost comparison of SCD.1453 and OL.887. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||