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 procedure for a new pair of silent Dunlop tyres with modified tread patterns.
| Identifier | ExFiles\Box 45\2\ Scan342 | |
| Date | 23th April 1931 | |
| X4050 RECEIVED 5 APR 1931 S/W. Hs.{Lord Ernest Hives - Chair}..from PN.{Mr Northey} Copy to Mr. O.{Mr Oldham} Silent Tyres. Further modification of tread pattern. The Dunlop Co. has sent us a next pair of these tyres with a view to our testing them on one of our trials cars. I understand that you also have a pair. Apparently the points to consider are :- (1) Relative skidability. (2) Silence. (3) Wear and tear. (4) Appearance. My feeling is that (a) in any case it is no good trying to form an opinion unless there are four tyres under test at the same time on the same car. (b) that the difference to be found in (1) is likely to be very small, and to form a useful opinion most meticulous tests will have to be made first with one type of tyre and with the other type of tyre on the same surface. I do not think that this could be very effectively done on one of our trials cars, and therefore I have arranged for the two tyres which have been sent here to be sent to you in the next car that goes to Derby from London, in order that you can carry out any tests you may consider necessary, and report to us. If at any point in the life of the tyres you would like us to collaborate and confirm your findings, we should be very glad to do so with the same set of tyres, either on your car or one of our own in London. PN.{Mr Northey} | ||