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).
Solutions for issues with gears, worms, splines, and damping segments.
| Identifier | ExFiles\Box 6\4\ 04-page168 | |
| Date | 15th May 1926 guessed | |
| contd :- -2- gear capacity than the Hispano, and therefore if properly lubricated, and of good material and shape, the gear will be alright. It was made a straight worm wheel because it was less expensive and easier to erect. Your experience suggests however that it should be a hollow worm. Regarding the length of the worm I am not sure that we have made it long enough, and if it is very short it may be engaging badly. It is quite easy to make a longer one, which I should advise. In regard to the gears still moving we understand that the larger 1st. gear does not work out. The order of procedure is to use 3 splines only, so that we are sure that the drive is distributed round, and not on two opposite splines, then increase their angle to 120° which is equal to the hexagon shaft. I also recommend that we fit the hexagon shaft and see what this does. Should these suggestions still fail we can only suggest that you use the larger pinion which will result in 5 scrapped wheels instead of 2. Regarding the squeaks I am getting DA.{Bernard Day - Chassis Design} to send you another form of damping segment which can be easily attached. It is assumed that this will be cast in a ring, bored and cut with a narrow saw into 4 segments. It is attached by a spiral spring passing right round it, the ends of which are hooked together. A wire of the spring can be tried in very thick gauge: it only needs to spring out sufficient to get into the groove. Thereis much of it to spring. The retaining lip similar to the Derby one must be cut in as it would be difficult to cast, but it need not fit accurately, and if you require it contd:- | ||