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).
Recommending the use of unlapped synchromesh cones for Phantom III gearboxes to save fitting time.
| Identifier | ExFiles\Box 94\2\ scan0171 | |
| Date | 11th February 1937 | |
| RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. to Mx.{John H Maddocks - Chief Proving Officer} 328 Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}3/R.11.2.37. SYNCHROMESH CONES. On the last few P.III boxes built in the Experimental Dept., we have not lapped the synchromesh cones. The efficiency of the cones has been better than those which have been lapped. We recommend, therefore, that six boxes are put through with unlapped cones, thereby saving 6 1/2 hours fitting time, for Mx.{John H Maddocks - Chief Proving Officer} to say whether they are successful or not. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||