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 wooden and wire wheels, and brake drums for chassis 2301.
| Identifier | ExFiles\Box 159\7\ scan0021 | |
| Date | 4th December 1912 guessed | |
| COPY. RL/B5513. C.J from F.H.R., Copies sent to; Mr.Bailey. Mr.Spinney. Mr.Nadin. Mr.Wormald. X421 COPY. Re Road Wheels. Chassis 2301 with double rear brakes was sent out here with wooden wheels and detachable Michelin rims. This is such an extremely good combination, as we have already concluded , that I expect that we shall always be asked to fit a considerable portion of our chassis with this combination. The only thing that I see necessary to alter from those fitted to 2301 is that the double brake drums should be made from a steel pressing of a good tyre steel fairly high in carbon and manganese. (We have already sent instruction and further instructions on this point). It will, therefore, require some slight modification in design, of which sketch has been sent, and this, I believe disposes of the question of wooden wheels and detachable rims. Referring to wire wheels, the position is rather more complex. The brake drums will be very much as described for wooden wheels. There are, however, one or two points that I have noticed in connection with the fitting of Dunlop detachable wheels. Having got what are, I believe, satisfactory angles of cones and nut faces and the coarse thread on the nut, I find that it is necessary to depart from the drawings which have been sent here so as to obtain considerably more latitude in the position of the nut which tightens the wire wheel hub on to the fixed hub. Fortunately, it was the front hub in which | ||