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).
To RHC about testing various bronze and hardened cones for the Phantom III Gearbox.
| Identifier | ExFiles\Box 94\1\ scan0324 | |
| Date | 4th February 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} X326 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}19/KW.4.2.36. Phantom III Gearbox. We understand you have in hand 3 or 4 sets of bronze cones, both screwed and crowned, in order that we can determine which type beds in quicker. In addition, will you please put through 3 sets, both top, third and second speeds, of hardened cones which are finished by diamond boring with a coarse feed. This of course applies to 10° cones. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||