Technical memo discussing improvements to the change gear mechanism, including jaw clutches and resilient couplings.
| Identifier | ExFiles\Box 6\2\ 02-page086 | |
| Date | 29th April 1930 | |
| X522 Da {Bernard Day - Chassis Design} /Hdy. {William Hardy} ) FROM R. {Sir Henry Royce} Hs. {Lord Ernest Hives - Chair} E. {Mr Elliott - Chief Engineer} (At Le Canadel(Henry Royce's French residence)) C. SS. {S. Smith} WOR. {Arthur Wormald - General Works Manager} R2/M29.4.30. X523 X5310 X7370 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} | ||
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).