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).
Use of a clutch brake with a synchromesh gearbox on the 20/25 and Phantom II models.
| Identifier | ExFiles\Box 104\4\ scan0133 | |
| Date | 7th May 1932 | |
| X 5310 Sg.{Arthur F. Sidgreaves - MD} from E.{Mr Elliott - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} E.1/HP.7.5.32. X7310. X7480. re Synchromesh - Sg.{Arthur F. Sidgreaves - MD}13/E.6.5.32. We do not use a clutch brake on the 20/25 and on P.II we propose dropping the brake when synchromesh is used. The only way in which the brake could be of use in the latter case would be in speeding up the change from 1st to 2nd (since the remaining changes up are all synchro) and also in initially engaging a gear with car standing supposing clutch was sticking. E.{Mr Elliott - Chief Engineer} | ||