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).
From 'R.' regarding the development of a silent, easy-to-change 4-speed gearbox using a Salerni coupling.
| Identifier | ExFiles\Box 52\4\ Scan080 | |
| Date | 13th January 1930 | |
| X4510 Da {Bernard Day - Chassis Design} /Hdy. {William Hardy} ) FROM R. {Sir Henry Royce} E. {Mr Elliott - Chief Engineer} Hs. {Lord Ernest Hives - Chair} ) (At Le CanadelHenry Royce's French residence) R8/M/13.1.30. c. Sg. {Arthur F. Sidgreaves - MD} Wor. {Arthur Wormald - General Works Manager} By. {R.W. Bailey - Chief Engineer} CAR CHANGE SPEED GEAR X.523 X.7310 X.5310. X.4510 I have asked Mr.Hardy to see if he can come here for one week clear, because I have for some time had a feeling that this year will see some good move on better change gears. I do not think it is done yet, and we would like to be in it. I have a 4 speed gear that should prove easy to make silent, and with the help of the Salerni coupling in its simplest form it ought to be easy to change. R. {Sir Henry Royce} | ||