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 tests, noise amplification, and development plans for experimental cars 34-EX and 33-EX.
| Identifier | ExFiles\Box 157\1\ scan0237 | |
| Date | 6th November 1935 | |
| W/S - Cx.{Major Len W. Cox - Advertising Manager} X1332 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}17/KW.6.11:35. 34-EX. Cx.{Major Len W. Cox - Advertising Manager}10/KW.4.11.35. ~ X360 34-EX. We note what you say about the tyres on our tests round here they are definitely a big improvement over anything we have previously had, which includes the Avons. We are not relaxing our efforts to improve the car, but we shall be very glad when we can have 34-EX to work on because this is the outstanding example of tyre noise amplification. You should get rid of detonation running on Ethyl. We are busy bringing 33-EX up to date. It will probably be a fortnight before it is finished, and we should then like to exchange it for 34-EX. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||