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).
Proposed modifications to the rear axle centre casing, including bearing changes and experimental lightening of the differential.
| Identifier | ExFiles\Box 20\7\ Scan117 | |
| Date | 12th October 1927 | |
| BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design} c. to BJ. Hs.{Lord Ernest Hives - Chair} X3807 DAL/M12.10.27. EAC.14. BACK AXLE. X.3807 X.7350 X.515 Herewith we send N.sch.2481 shewing the proposed modification to the inside of the rear axle centre casing. Since the adoption of the spiral bevels the thrust on the gear seems to have been much reduced, and there seems no reason for the separate thrust bearing now, so that it is suggested that a double New Departure, or a Hoffmann deep groove should do both jobs. The roller bearing on the other side has about the same capacity of the existing ball bearing. The lightening of the differential cage is intended to come out of the existing forgings, and as regards the drilling of the cage and the bevel wheel, this is experimental, and we should like to see the result before we are committed to it. It will be noticed that we have alte-red the practice in one or two cases as to the direction in which the bolts lie, and if there is anything in the assembly which makes this difficult we should like to know. We believe the adjustment of the bevel meshing is as convenient as it is now, but we should like to have any comments that may be made. DA.{Bernard Day - Chassis Design} | ||