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).
Test report on Dunlop straight-sided tyres fitted to an experimental car, assessing ride comfort and noise levels.
| Identifier | ExFiles\Box 45\1\ Scan167 | |
| Date | 29th December 1920 | |
| X.4050. Extracts from EP{G. Eric Platford - Chief Quality Engineer}15/F29.12.20. 29.12.20. X.3473 X.4050 X.2474 .X.4305 RE EXPERIMENTAL CAR 2.EX. ------- Dunlop straight-sided tyres. These gave no trouble, but felt rather hard when riding over pot-holes. As regards noise, they seemed quite good as compared with the new Magnums. At the same time, they were still slightly audible, but on the whole very encouraging. Before giving a final decision on this point, comparisons should be made on this car between these tyres and Magnum, for noise as noted when driving, and also when standing on the footpath whilst the car passes. Especially should this test be taken over a tar macadam road which is in a dry state. EP.{G. Eric Platford - Chief Quality Engineer} | ||