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).
Remark from Mr. Royce on an Urgency report regarding gear ratio and pitch.
| Identifier | ExFiles\Box 2\6\ B002_X 140 141 157-page053 | |
| Date | 5th February 1913 | |
| X. 138 Mr Royce remarks on Urgency report dated 5/2/13 (AM/SM13/03213) re above as follows :- *Their ratio should be same but diff. pitch.* "15/49 & 16/52" | ||