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).
Query regarding the fan drive ratio compared to a Buick, with the goal of reducing fan noise.
| Identifier | ExFiles\Box 135\4\ scan0079 | |
| Date | 29th October 1940 | |
| Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham} From Rm.{William Robotham - Chief Engineer} Handwritten: Fan - general, 1135 Rm.{William Robotham - Chief Engineer}8/ML.29.10.40. I note that the fan drive ratio is almost 1/1 to reduce fan noise, on the Buick. What is our present figure? Rm.{William Robotham - Chief Engineer} | ||