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).
Extract discussing the relative merits and issues of Dunlop, Rudge-Whitworth, and Michelin wheels for the 40/50 HP chassis.
| Identifier | ExFiles\Box 159\7\ scan0048 | |
| Date | 26th November 1918 | |
| X1264 X401 X.3476. Extract from R4/G261118. 1000 - 40/50 H.P. CHASSIS. (5) Road Wheels. X.1253/4. The Dunlop pattern of road wheel hub is very complicated and rather heavy. The wire wheels too have also been somewhat troublesome through broken spokes. I am of the opinion that the Rudge-Whitworth wheel may be considered as simpler and less likely to be wrongly constructed through errors of dimensions. Records of the behaviour of this type of wheel during the War should be found with a view of adopting it instead of the Dunlop pattern. X.3482. As an alternative, I strongly recommend that we are once design a hub to carry the Michelin disc wheels, which I understand have done so well in France during the War, which are so clean and simple, convenient for twin tyres, and also are beneficial to the tyres, inasmuch as they do not run so hot. This type of wheel should probably meet favour with the Paris people and with Count Salamanca. The only point I am not sure about is whether they entail extra weight, but I think when the double dub is weighed with the wire wheel, the disc wheel will not be very much heavier. | ||