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).
Testing of 7.5' tyres on a Phantom III model.
| Identifier | ExFiles\Box 158\1\ scan0181 | |
| Date | 27th April 1938 | |
| 1339 W/S. Cx.{Major Len W. Cox - Advertising Manager} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}1/R.27.4.38. 7.5" tyres on P.III. With regard to your memo Cx{Major Len W. Cox - Advertising Manager}5/KW25.4.38., we cannot usefully test the tyres you have removed from your Trials car, because we have at the Works a set of tyres made from the latest mould which are very much quieter. We shall report on the behaviour of these in due course. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||