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).
Continuation of tests on aluminium alloys and proposing the use of Magnalium for specific components to achieve increased lightness.
| Identifier | ExFiles\Box 36\3\ scan 022 | |
| Date | 27th April 1917 | |
| R.R. 255 a (400 T) (S.C. 638. 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546 To EFC. from R.{Sir Henry Royce} c. to g.{Mr Griffiths - Chief Accountant / Mr Gnapp} c. to Na.{Mr Nadin} c. to Wor.{Arthur Wormald - General Works Manager} X. 3031 R4/B27.4.17. Re Tests of Aluminium Alloys. X. 2746 X. 2749 X. 2885 X. 2281 X. 2783 X. 2804 With reference to the above, I think these tests are most valuable and should be continued! Earlier on we were testing specimens with the Upton Lewis machine, in which it was shown that brittleness increased with copper contents of the alloy, and I should like the present range of alloys to be tested on the Upton-Lewis machine also, if it is convenient to get suitable samples. Regarding Magnalium, I suggested this some time ago for crankchambers, owing to its specific gravity showing it to be somewhat lighter than pure aluminium. There is also therefore a lot of difference in volumetric weight between this metal and our present crankchamber alloy with its large percentage of zinc. At the time I was informed that we could not find where to obtain this metal, but it now appears that we have got a little at least, and I should be glad to know whether we could get a sufficient supply for any portion of our work, such as camshaft casings, and the smaller pieces where there is much machining and some screw threads, because I believe it is very good for tapping or screw milling threads, such as would be wanted for some of the parts recently arranged to get increased lightness. I should also propose the use of Magnalium where we have lately been specifying piston metal. I condemned the use of piston metal except for pistons. Contd. | ||