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).
Design changes and instructions for various engine components including a planet pinion and epicyclic gear.
| Identifier | ExFiles\Box 37\2\ scan 051 | |
| Date | 31th October 1918 | |
| -2- Contd:- "six projections, three of which must be further machines to form the planet pins with a cutter large enough in dimater to remove all of the metal of the boss not required, and leave a face on the flange for locating the planet pinion". "This driving shaft still requires a transverse pin at the end nearer the starting handle so that it can be drawn back with a piece of wire when it is desired to remove the starting motor from the engine." "The comtrol shaft boss on the worm gear casing must be milled away as before to accommodate the starting motor. The nuts on the starting motor gearcase are very close to the casting containing the worm gear. If necessary the spring washers must be cancelled and the nuts locked by centre punch holes to obtain more clearance." "This epicyclic gear differs from the previous design in that the cage is located between two vertical surfaces between which it runs xxxxxxxxxxxxxxxxxxxxxxxxxx and is centred by a journal bearing on one side only. On the motor side the cage runs against the aluminium end cover of the motor and on the other side the cage runs against a gunmetal bush which is sweated to the steel gear case in the internal diameter of which the annular gear is formed. This steel gearcase should be made from a forging. The dies required for it are very simple to make. The cage must be assembled and ground to base one thickness dimension for the distance between its side bearing faces. This dimension can be "miked" and can therefore have a fine limit. The bronze brush must be sweated in to the steel gearcase and its xxx face and bore together with the spigot diameter and the face of the gearcase must all be ground off the dimater of the nose which spigots the motor in the engine. In this manner the running fit of the cage sideways is only dependent on two dimensions and can be made satisfactory without an adjustment." Would you kindly proceed with thisjob on the lines indicated. E.{Mr Elliott - Chief Engineer} per C.M.G. | ||