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).
The design and suspension of the 'Japan 3' gearbox.
| Identifier | ExFiles\Box 104\4\ scan0203 | |
| Date | 8th September 1933 | |
| X5310 To DY.{F R Danby} from HDY.{William Hardy} MDY.1/HP.8.9.33. C. Por. H, Hs{Lord Ernest Hives - Chair}, Ha, NHO, Sft.{Mr Swift} COPY Gearbox - Japan 3. Herewith N. Sch's 3809,10 and 11 which shew the actuating gear, casing and suspension of the front half of the gearbox. To save length on the sliders and get simpler pieces we have placed the locating and interlock piece inside the box on the division plate. We are unable to find that there is ever any trouble from this piece and so the inaccessibility should not be of any consequence. The sliders are slightly smaller in diameter than on the 20/25 and are closer together. The side movement of the change lever is less than now and is the same as for Peregrine. The front end of the box is suspended from a tubular crossmember at two rubber insulated points, and it should be noted that there is no provision for lateral movement at the junction of the gearbox and crossmember such as will be required to align the box in the frame. It is intended that this alignment shall be done by packing plates between the ends of the crossmember and the frame for lateral movement and by drilling the holes in the frame with the gearbox and crossmember in position for horizontal and vertical alignment. Flexible stays are provided to transfer the propeller shaft sliding joint friction load direct to the crossmember. The stays are not symetrical and there will be a small lateral force on the rubber suspension, but we do not thick that the stay joints will move under this load. Our impression is that very little flexibility will be required in the rubber suspension, and it may be that the stays can be deleted especially if the friction in the | ||