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).
Secret memorandum regarding an updated synchromesh cam for the Spectre Gearbox.
| Identifier | ExFiles\Box 94\1\ scan0175 | |
| Date | 23th August 1935 | |
| GRY{Shadwell Grylls} X328 To PY. from HDY.{William Hardy} c.c. E.R. Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} RHC{R. H. Coverley - Production Engineer} SECRET. HDY.{William Hardy}1/HP.23.8.35. SpectreCodename for Phantom III Gearbox. We send herewith N.Sch.4605 which shows a 52½º synchromesh cam for the top and 3rd gears. The present angle is 47½º and the increase in the locking effect given by the new cam is 19%. N.Sch.4605 herewith. HDY.{William Hardy} | ||