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).
Unfinished experimental design for mounting an Evans Vacuum Gear Shift device on the Phantom 111 chassis.
| Identifier | ExFiles\Box 94\2\ scan0324 | |
| Date | 6th October 1938 | |
| Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} 328 DA.{Bernard Day - Chassis Design}2/G.6.10.38. PHANTOM 111. VACUUM GEAR SHIFT. Herewith are prints of G.CD.918 (2 sheets) [Handwritten note: FJH{Fred J. Hardy - Chief Dev. Engineer}] Mounting of Evans Vacuum Gear Shift device in the Phantom 111 chassis. The design, which is quite unfinished is, of course, merely an experimental apparatus for trying out the functioning of this device. We originally intended to make a complete experimental design, but owing to the time required to finish it, it is thought better, as arranged with you, to give you prints of the design as far as it has gone, to enable you to mock it up in a chassis without details. We have not dealt at all with the change gear shaft, which seems to require a part between the actual gear change lever and the vacuum operated selector lever shaft, which is capable of giving endwise sliding, to enable the gear to be selected, but is incapable of giving torque, the torque required for operating the gear without the aid of vacuum passing through the cylinder linkage. A link with two spherical ends is one obvious way of doing it. If you find that this part is difficult to mock up, we can give you a scheme a little later. DA.{Bernard Day - Chassis Design} | ||