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 in a Phantom III Trials Pullman car, noting that adding rubber between the axle and rear springs made the noise worse.
| Identifier | ExFiles\Box 158\1\ scan0106 | |
| Date | 5th January 1937 | |
| 1339. S/W {Sales / Derby Works} (Rm {William Robotham - Chief Engineer} ). Cx {Major Len W. Cox - Advertising Manager} 10/ES.5.1.37. Phantom III Tyre Noises. We now have our London Trials Pullman Phantom III back with rubber between axle and rear springs. Neither the driver nor I could see any improvement in this car which is definitely bad at 18/20 m.p.h. I suppose it is impossible for the car to be worse by reason of what has been done to it, but if it was possible, I should certainly say it was more noisy now than it was before. It is true that our own drivers can avoid running at 18 m.p.h., but I have no doubt you would like to investigate further this important question with a view to its elimination. Cx. {Major Len W. Cox - Advertising Manager} Lueb | ||