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).
Instruction regarding the use of wide synchromesh cones for the Phantom III gearbox.
| Identifier | ExFiles\Box 94\1\ scan0205 | |
| Date | 1st October 1935 | |
| H S +328 GRY.{Shadwell Grylls} Do we agree? Rm{William Robotham - Chief Engineer} Yes DY.{F R Danby} c.c. B. Hs.{Lord Ernest Hives - Chair} RHC{R. H. Coverley - Production Engineer} HDY.{William Hardy}1/HP8.10.35. Phantom 3 Gearbox. Will you kindly note that of the alternative wide and narrow synchromesh cones for top and third and second speeds the wide cones should be instructed in all cases. HDY.{William Hardy} | ||