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 for a shaft with a sliding joint in the gearbox, reference PL.344.
| Identifier | ExFiles\Box 148\4\ scan0162 | |
| Date | 18th September 1940 | |
| 1262 To Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/HH. c. to Ev.{Ivan Evernden - coachwork} Prop shafts General Ev{Ivan Evernden - coachwork}/Tln.1/JH.18.9.40. PROP: SHAFT WITH SLIDING JOINT IN GEARBOX. PL.344 We attach herewith to Rm{William Robotham - Chief Engineer}/HH's. copy the original of the above scheme. Two prop: shaft features are shewn on this scheme; a sliding joint on the gearbox 3rd. motion shaft; and a scheme for attaching the moving prop: shaft (at the centre bearing) by means of U bolts around the trunnions instead of the usual flange joint. This second feature, the U bolt coupling, should be disregarded at present and a standard coupling used. Rm{William Robotham - Chief Engineer} The sliding joint on the rear of the gearbox must be used in conjunction with PL.283 centre bearing and should be detailed for the Senior Gearbox for development cars such as Silver Ripplet and Comet. For other cars the Senior Gearbox remains as already instructed. Rm{William Robotham - Chief Engineer}/HH. should make layouts of the prop. shafts to determine their lengths on the various cars. We have drawn the sliding joint long enough to allow full pumping and also + or - 3/8" variation in distance from the gearbox to the rear axle. The end of the 3rd. motion shaft will now have about 16 splines to suit the Hardy Spicer sliding joint. These will be top fitting splines and should be fixed up in co-operation with Hardy Spicer. The limitation we impose is that the top diameter shall be less than our rear bearing bore. The servo worm is driven on splines cut at the same time but having a top dia. slightly larger than the bearing bore. Thus two broaches are involved, one for the Hardy Spicer piece, and one for our servo worm. T.hu. Ev{Ivan Evernden - coachwork}/Tln. Original to Rm{William Robotham - Chief Engineer}/HH. Prints to Rm.{William Robotham - Chief Engineer} Ev.{Ivan Evernden - coachwork} Oy. & Ashby. | ||