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).
Fan speed ratios for the 40/50 HP car and issuing a correction to a previously circulated blueprint.
| Identifier | ExFiles\Box 38\2\ Scan241 | |
| Date | 11th September 1924 | |
| X3456 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c.c. to CJ. BJ. c.c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c.c. to DA.{Bernard Day - Chassis Design} Wor.{Arthur Wormald - General Works Manager} c.c. to EY. Hs{Lord Ernest Hives - Chair}3/LG11.9.24. FAN SPEEDS. X3456 The ratio of our Fan Drive on the standard 40/50 HP. car is 1.2 times engine speed. The high speed Fan is 1.5 times engine speed. In the blue print sent out showing comparisons of different radiators, we gave the fan speed of the R.R. as 1.5" - this should be altered to 1.2". Hs.{Lord Ernest Hives - Chair} | ||