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).
Criticisms of a sprung-on disc wheel and proposing alternative designs.
| Identifier | ExFiles\Box 160\1\ scan0080 | |
| Date | 3rd February 1939 | |
| 1376 To Da.{Bernard Day - Chassis Design} from Ev.{Ivan Evernden - coachwork} c.c. Ey. Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork}20/N.3.2.39. Re: Discs for Pressed Steel Wheels. We have already issued PD.341 shewing a large sprung-on disc for the B.5. steel wheel. This has been criticised for two reasons: (1) The paint finishes on sharp edges. (2) The disc diameter could be reduced, like the sample of Talbot disc we have received, to save cost if we have to use Staybrite. Whilst we would like a model of PD.341 to be made, we have produced PD.369 herewith to deal with the above criticisms, (left hand view). This shews the standard wheel for B.5. but on PD.370 we shew the same disc applied to the heavy rim Corniche wheel. Without alteration we could use it on the Corniche light rim wheel. Referring again to PD.369, we shew an alternative design of double disc for the standard B.5. steel pressed wheel. A centre cover is sprung in as on the original design, and an outer disc is held on by springs. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} has promised to give us a pre-view of this scheme by fitting such an outer disc to a B.5. wheel with the present centre pressing. Ev.{Ivan Evernden - coachwork} | ||