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).
Specifications for lightened brake drums and hubs for a Ripple Chassis I.R.I.
| Identifier | ExFiles\Box 159\5\ scan0015 | |
| Date | 23th May 1940 | |
| C O P Y. To Rm.{William Robotham - Chief Engineer} C. to Ev.{Ivan Evernden - coachwork} THE PARTICULARS GIVEN IN THIS MEMO HAVE NOT BEEN ISSUED ------------------------ 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. | ||