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).
Test procedure for a sample Scott banjo axle for the Wraith model.
| Identifier | ExFiles\Box 114\1\ scan0013 | |
| Date | 22th May 1936 | |
| RHC{R. H. Coverley - Production Engineer}: C. E.De. BY: Hs{Lord Ernest Hives - Chair}/Fm. X1044 1015' E/HDY.{William Hardy}1/HP.22.5.36. Banjo Axle for Wraith. We send a print of N.Sch.4812 herewith which shews what we suggest to test the sample Scott axle banjo which has been obtained for test purposes. To enable the sample to be tested with the same positions of load application as will occur on the Wraith we suggest that extensions are welded to the ends. To give as true a comparison as possible with the proposed Wraith axle a centre should be built up of steel plate welded together. Although there are two sample axle forgings, only one is considered to be suitable as the other will be found to have cracks on the inside surface. Therefore all of the tests have to be made on the one forging and our suggestion is that this can be done by taking the load only so far as is necessary to produce a small permanent set. If the loads are increased by say 100 lbs at a time and the deflection measured and plotted against the load a straight line should be obtained until the yield point is reached when there will be a marked deviation: The test should then be stopped and as a check, when the load is all removed, it can be confirmed that a permanent set has actually occurred. N.Sch.4812 herewith. E/HDY.{William Hardy} | ||