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).
Different design proposals for the Goshawk I & II steering box.
| Identifier | ExFiles\Box 49\4\ Scan234 | |
| Date | 22th January 1921 | |
| X.4264 DA {Bernard Day - Chassis Design} 3/CB22-1-21. To R from DA. {Bernard Day - Chassis Design} Copy to EWB Copy to EFC. {E. Fowler Clarke - Electrical Engineer} RECEIVED X4264 RE "GOSHAWK I & II" - STEERING BOX. We send herewith a print of "N" Scheme 720 showing the steering box worked out in accordance with your suggestions. In Fig I we have shewn the proposal to serrate the shaft right across with the parallel serrations and hold the levers on with a nut at each end, and a distance piece between. As far as we can see this makes the box rather bulky, as in order to keep up the strength of the shaft at the pendulum lever end, we get a big thread, and then a castellation over the top of the thread. In case the box may be thought too big with this arrangement, we have shewn in Fig 2 a suggested alternative in which there is only one nut, there being a collar at the other end. This enables us to get the pendulum lever end at full strength, and reduce considerably the diameter of the castellation, so that the box, generally, is very much smaller. But Fig 3, which is your final suggestion, appears to work out the best of all, as the box is not increased over the present one, except in the particulars that you ask for, namely, a little wider so as to get more bearing for the nut. The box on Goshawk II is more easy to get inside the frame than in the case of Goshawk I, on account of the greater width of the frame, but it causes the pillar support to be longer. We have shewn this increased overhang on Fig 3. DA. {Bernard Day - Chassis Design} | ||