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).
Improvements to the car's gear change mechanism, relating to jaw clutches and resilient couplings.
| Identifier | ExFiles\Box 6\4\ 04-page249 | |
| Date | 30th April 1932 | |
| X5310 Ds/Hdy.{William Hardy} ) FROM R.{Sir Henry Royce} Hs.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} ) (At Le CanadelHenry Royce's French residence) C. SS.{S. Smith} WGR. CAR WORK - CHANGE GEAR. When the box is fitted with any form of constant mesh gears with jaw clutch change, the jaw clutch should have many teeth, and every other one, or two and one, or even three or four and one, should be cut back to allow plenty of time or backlash for the first 1/4" or so of engagement. Also the ordinary box or any like the above would undoubtedly be benefited by fitting a rubber or other resilient coupling, either in front of or close behind the gearbox, preferably both. The rubber block type suggested by us for magneto drive may be a good one. Any backlash or elasticity in the transmission would help. We generally get very little of either in RR, which I have always thought was the reason for most of the complaints against ease of changing in RR. cars. R.{Sir Henry Royce} [Handwritten annotations on right side] x523 X5310 X7310 | ||