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).
Proposal to modify the Synchro-mesh units for the Wraith & Phantom III models to reduce machining costs.
| Identifier | ExFiles\Box 148\5\ scan0410 | |
| Date | 16th August 1938 | |
| PY & Rm.{William Robotham - Chief Engineer} from RHC{R. H. Coverley - Production Engineer}/DWB.{D. W. Brown} C. Hde 12609 RHC{R. H. Coverley - Production Engineer}/DWB.{D. W. Brown}1/LS.16.8.38. Doubt if this will work. Rhy WRAITH & PHANTOM III. SYNCHRO-MESH UNITS. The operating cams in the above Synchro-mesh units are at present guided in the sliding member by means of a pin (GW.149 & G.54883) and in the outer member by means of a series of ground flats. It is thought that the mechanism would operate satisfactorily if the pin and flats were eliminated, and a plain circular cam as shown in Fig.I. were used in its place. This would effect a saving in machining of approximately 2/- per unit, or 8/- per chassis. The 'Vee' slot in the outer member would be altered in form, but this could be introduced without serious tool charges. We therefore suggest that a design be prepared along these lines and a set of parts tested with a view to standardising this scheme. AS SUGGESTED EXISTING Fig I RHC{R. H. Coverley - Production Engineer}/D.W.Brown. | ||