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).
Instructing changes for the Ripple Chassis I.R.I. regarding lightened brake drums and corresponding hubs.
| Identifier | ExFiles\Box 118\1\ scan0293 | |
| Date | 23th May 1940 | |
| Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/HH COPY 1022 Rm{William Robotham - Chief Engineer}/HH.5/23.5.40. This memo has not been instructed. RIPPLE CHASSIS.I.R.I. Rear Hub-Sec. 6170. Front Hub-Sec.7044. Lightened Brake Drums, in accordance with specification Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}8/MH.{M. Huckerby}19.3.40. In accordance with the above, the following should be instructed for this chassis: Sec.6170. RG.{Mr Rowledge}800. L.O.P. Rear Hub. Sec.7044. RG.{Mr Rowledge}473. L.O.P. Front Hub. The wheels remain as at present fitted, viz. GB.4026-4. 500 by 16.000 wheel, to suit 6.500 by 16.000 tyre. Rm{William Robotham - Chief Engineer}/HH. M.G.A. | ||