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).
Extract from a communication regarding a trial for a variable speed fan.
| Identifier | ExFiles\Box 135\1\ scan0004 | |
| Date | 8th February 1922 | |
| X.1509 Wa{Mr Wallis}7/Go8.2.22. MADE AT CROXLEY Extract from Wa{Mr Wallis}7/Go8.2.22. X.2628. I note that you do not consider the Variable speed Fan is very interesting, I will ask you only to give one a trial which my friend is preparing. Wa.{Mr Wallis} | ||