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 discussing the two fans used on a motor and their power consumption.
| Identifier | ExFiles\Box 156\2\ scan0068 | |
| Date | 13th April 1938 guessed | |
| -2- As regards the fan which we would use on your motor, the answer is two fans - one as per the one you sent us, the other a small blower fan as shown on attached print. The power consumptions quoted above are taken with these two fans in operation. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||