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).
Results of high-speed wobble tests on three different sizes of tyres in France.
| Identifier | ExFiles\Box 45\1\ Scan364 | |
| Date | 10th September 1926 | |
| X4050 To R: from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}1/LG10.9.26. HIGH SPEED WOBBLES. X457 X4565 With reference to our Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}5/T23.8.26. in connection with peripheral weight tending to reduce the susceptibility of a tyre to high speed wobble. It is rather interesting to note that we have been testing three sizes of tyres in France (all of 6-ply construction) These are - 6" Dunlop, 6.2" Michelin, and 6.75" Dunlops, all of which fit the same size of wheel. The 6.75" tyres wobble the least, the 6.2" are intermediate, the 6.00" are the worst. We are trying to conduct a test to substantiate this theory more fully. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||