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).
Non-skidding properties and testing of new silent tread tyres against existing standards.
| Identifier | ExFiles\Box 45\2\ Scan349 | |
| Date | 21th May 1931 | |
| 84080. Sales. To C. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} FN. c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/KT. 21.5.31. Further to our telephone conversation of yesterday. Attached is a photograph shewing the silent tread tyre with the transverse grooves which was standardised in Dec. of last year, this is marked standard, and beside it is the tyre that has been submitted to us for test by the Dunlop Rubber Co. because it has a more convincing non-skidding appearance. We do not believe it will be possible to detect any difference between the non-skidding properties on ordinary British main roads. We shall run this new silent tread tyre on the car that is about to go to France and compare it with the existing tyre having the transverse grooves. We think that the one advantage that these new tyres have is that they may maintain their non-skidding properties longer than the existing standard silent tread, which is an important point. At the present moment our recommendations are as follows. For English conditions the silent tread tyre was standardised 12.11.30. For Colonial and Continental conditions the triple stud tyre. We very much doubt whether, even if the new tyre we have on test comes out well, we shall be able to get the same result as with the triple stud tyre on unmetalled roads having a soft surface. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||