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).
The adoption of 11-tooth versus 12-tooth axles for the 20 HP Chassis.
| Identifier | ExFiles\Box 49\2\ Scan199 | |
| Date | 23th July 1924 | |
| COPY. To BJ. from Wor.{Arthur Wormald - General Works Manager} Wor{Arthur Wormald - General Works Manager}9/M23.7.24. Re 20 HP Chassis. 11 or 12 Tooth Axles. BJ5/H23.7.24. I now see no objection to adopting 11-tooth axles on all 20's. They are not now more difficult to make silent than 12-tooth. We have 8 or 9 12-tooth axles at the present time and we should like to use these up, because quiet axles are never too easy to obtain, but in future we could definitely decide all 11-tooth axles. Please let me have your instructions. (Sgd.) Wor.{Arthur Wormald - General Works Manager} | ||