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).
Tyre noise issues, the use of rubber components in the chassis, and comparing different car models.
| Identifier | ExFiles\Box 157\1\ scan0296 | |
| Date | 9th April 1936 | |
| X1332 To Hs.{Lord Ernest Hives - Chair} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}11/KW.9.4.36. Tyre Noise. With reference to Sg{Arthur F. Sidgreaves - MD}'s note, the red car demonstrated in London and approved by Sales was not fitted with fake tyres. It was fitted with the Dunlop 90 tyres which it is proposed to standardise on the Ph.III. They say that 36-EX under the same conditions is impossible. This illustrates one of our problems, that all motor cars made to the same specification do not behave the same. We have a car which has been running about with nothing except the rubber body mounting standardised for production, and which is far better than the average 20/25 which is being demonstrated to-day for tyre noise. We expect that we shall get Ph.III cars with rubber shackles, rubber between the axle and rubber body mounting which will not be as good as this car by a long way. Our opinion is that the generous insertion of rubber in the chassis, where it can affect the stability of the car, should proceed slowly. We should not be at all surprised if, having rushed into fitting all these rubber parts to reduce tyre noise, we are not busily engaged in removing them in 12 months' time. The Cadillac is agreed by everyone to be hopeless for cornering under English conditions. Due to the variation from chassis to chassis | ||