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).
Required number of fan blades and a request to remove three from a trials car.
| Identifier | ExFiles\Box 75\3\ scan0090 | |
| Date | 4th December 1919 | |
| To EH. from R.{Sir Henry Royce} Copy to CJ. " " DN. K 34 38 R2/G1/12/19. RE THREE-BLADED FAN. Thank you for your memo with reference to the three-bladed fan. It would appear that three blades are all that are necessary. We should be glad therefore, if you will on one of your trials cars, take three off. R.{Sir Henry Royce} [Signature] [Stamp] 4 DEC 1919 | ||