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).
Features and benefits of the Layrub Flexible Propeller Shaft Coupling.
| Identifier | ExFiles\Box 148\4\ scan0037 | |
| Date | 28th September 1934 | |
| X484 GRY{Shadwell Grylls} Should like to see detail drawing of this R-R To E.{Mr Elliott - Chief Engineer} from Da.{Bernard Day - Chassis Design} Da.{Bernard Day - Chassis Design}2/HP.28.9.34. c. Hs.{Lord Ernest Hives - Chair} Layrub Flexible Propeller Shaft Coupling. Mr Oldfield, the Sales Manager of the Laycock Engineering Co. came here yesterday, to describe the Layrub Flexible Propeller Shaft Coupling, particulars of which have been previously sent us. He said that the coupling has been standard on many commercial vehicles, particularly Dennis for some time, as well as some pleasure vehicles. It has been found to remove the over-run rattles and smooth out the drive, as well as to absorb with a considerable reduction of end load, the pumping motion. They had independently found that sliding splines offered very great resistance to being moved under load, whereas the maximum end load, depending on the amount of end movement needed, which the Layrub joints can give is 175 lbs. They can absorb 1.500 of pumping with this maximum load. Another advantage is that whereas the splines transmit the full load for any movement however small, the rubber joint is proportional to the movement. They claim that they can make the shafts run absolutely true and balanced. The whirling speed tends to be reduced by these joints, but they can deal with it. They claim 200,000 miles' life under commercial vehicle conditions, and the renewal of the rubber bushes is then a very simple matter. They say they can design a joint to come within our present universal joint dimensions, which will stand up to the load, speed and angular movements. As these joints, if successful, would | ||