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).
Conclusions on average car heater fan speeds and a proposed heater and de-icer design.
| Identifier | ExFiles\Box 137\1\ scan0309 | |
| Date | 17th November 1937 | |
| -3- Conclusions. From these figures it appears that the average car heater fan speed is between 1100 and 1300 RPM. Further it should be quite practicable on the proposed R.R. heater and de-icer to mount the fan and blower in the same spindle and run same at approximately 1200 - 1400 RPM. Rm{William Robotham - Chief Engineer}/Std. | ||