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).
Letter to E.R. Hall, Esq. discussing an alternative drive scheme for a first motion shaft.
| Identifier | ExFiles\Box 90a\6\ Scan184 | |
| Date | 1st June 1938 | |
| 262. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}5/R.{Sir Henry Royce} E.R.Hall, Esq., 53, Berkeley Court, LONDON, N.W.1. 1st. June 1938. Dear Sir, In reference to our 'phone conversation this morning and the fact that you cannot get a drive machined to suit the splines in the first motion shaft, we have looked into the piece we use in this drive, and find that it could not be adapted to take the drive without over-stressing any attachment bolts or pins. We have arranged an alternative scheme of drive which can be carried out on the actual first motion shaft we have supplied you with which will easily take the drive torque without over-stressing. This modification is pencilled in on the enclosed drawing GW.781, and consists of machining away part of the gear, which incidentally is hardened and will require grinding to get under the case, opening up the existing 6 bolt holes to .250 dia. and a flange making to suit, spigotted off the bore of the first motion shaft, the other side, of course, being madeto suit your drive. We do not know what type of drive or gearbox you are going to use, but recommend that a flexible coupling be used close up to the first motion shaft, or, failing this, another bearing lineable with the first motion shaft ball race. In confirmation of what we said this morning, the ball race should be packed with grease, and in order to keep packed, some form of renewal grease fitted. Unless a special piece be made, about which we could not give any idea of when it would be completed, we consider that the alternative way of taking the drive direct | ||