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).
Letter to R.K. Pierson of Vickers (Aviation) Ltd. discussing wind tunnel tests on model cars and their limitations.
| Identifier | ExFiles\Box 161\1\ scan0192 | |
| Date | 22th September 1938 | |
| c. By.{R.W. Bailey - Chief Engineer} c. Rm.{William Robotham - Chief Engineer} 1380 22nd. September 1938. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork}9/N. R.K.Pierson,Esq., Messrs.Vickers(Aviation) Ltd., Weybridge Surrey. Dear Mr.Pierson, Thank you very much for your letter of the 20th.inst. reference DLE/EMS referring to our wind tunnel tests on model cars. We were very glad to have your remarks as they entirely confirm the conclusions we have come to after reading several articles on wind tunnel experience. As far as we can see, it is only possible to use the wind tunnel to test models of cars all having a similar air flow. We have tried the actual car with undersheets on and off, and found that the effect in the drag is very small, but we have not so far tried the effect of cooling flow, leaks, excrescences &c. If we may, we would very much like to have a word with you again, after we have got some more experience with the car. Yours sincerely, H.I.F.Evernden. | ||