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).
Proposing a modification to the Spectre gearbox by increasing the synchromesh cam angle.
| Identifier | ExFiles\Box 94\1\ scan0172 | |
| Date | 20th August 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} 4328 Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}5/KW.20.8.35. SpectreCodename for Phantom III Gearbox. Owing to unsatisfactory operation of the 3rd and top synchromesh on SpectreCodename for Phantom III gearboxes, we wish to try increasing the cam angle from the present 47.5° to 52.5°. The sketch below shows how we wish to do this. Will you please detail this and fit modified pieces to SpectreCodename for Phantom III I next time this car comes into the shop. If it is possible to alter existing pieces or to make new pieces in time, we should like this modification on SpectreCodename for Phantom III II. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. 75° UNALTERED | ||