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).
Suggesting a new standard for a fan based on drive ratio improvements.
| Identifier | ExFiles\Box 75\3\ scan0067 | |
| Date | 25th September 1924 | |
| R.R. 493A (50B) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -6- Expl. No. ______ Contd. REF EFC3/T20.______ and being a rather higher speed fan than 18 is suited to the present drive ratio of 1.2. We therefore suggest that our final form of fan might be considered as an experimental improvement upon the production form 15. and treated accordingly, and when the most satisfactory drive ratio has been decided upon, this might be standardised in the usual way. EFC. | ||