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).
Technical memo discussing the design, fitting, and adjustment of a propeller shaft with a Layrub joint.
| Identifier | ExFiles\Box 148\4\ scan0039 | |
| Date | 15th November 1934 | |
| L484 Rm{William Robotham - Chief Engineer} Gry{Shadwell Grylls} To BY.{R.W. Bailey - Chief Engineer} from HDY.{William Hardy} HDY.{William Hardy}2/HP.15.11.34. c. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} RMC. Propeller Shaft with Layrub Joint. N. Sch.4262 herewith shows a shaft with a Layrub joint at the front end and our standard joint at the back. The scheme follows the suggestion made by Da.{Bernard Day - Chassis Design} in N. Sch.4243. There is no sliding joint so the Layrub has to take care of all of the pumping and as this is entirely forwards we have given the joint an initial extension of .2". We cannot be sure what variation from standard length will be found on the chassis to which this is fitted so we suggest that the shaft is not completely built-up until the chassis has been measured and then the shaft which has been made too long, as we indicate on our drawing, is shortened to give the correct length. In case it is subsequently desired to alter the amount of the initial set of the joint we provide a packing washer .150 thick between the joint flanges. Should this joint go on production the question of adjustment would need re-consideration, no doubt. The packing washer has a double spigot in order to facilitate the assembling of the complete shaft in the chassis. As the shaft is .2" shorter than when bolted to the flanges very little deflection of the joint is needed to allow the shaft to pass into place. We should have preferred a single spigot on the gearbox flange but this involves interfering with the gearbox which is undesirable in this case. We should prefer that all of the pieces be made | ||