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).
Appropriate metal for covering Goshawk engine exhaust/inlet tubes and resolving procedural conflicts with dynamometer testing.
| Identifier | ExFiles\Box 48\4\ Scan174 | |
| Date | 28th August 1932 | |
| X4238 Hs.{Lord Ernest Hives - Chair} from BY.{R.W. Bailey - Chief Engineer} c. Wa{Mr Wallis} c. EB BY1-P28.8.32. RECEIVED 28 AUG 1932 GOSHAWK 11. RE COVERING OF EXHAUST & INLET TUBES X4238 WITH "BLOWN METAL" I notice that we have only received pipes covered in aluminium - Mr Mills informs me that another set are ordered in zinc. I think this is a mistake, as the only metals which to my mind are likely to resist the extreme heat effect are nickel and copper - Zinc certainly will melt off. There is one other point, from an examination of the pipes which I have seen, which I think would be an improvement, namely, to cover the pipes with "blown metal" before machining, as then the screw threads and plain faces would not be roughed up and increased in dimensions by the covering process. Would you kindly issue instructions for two more sets of pipes to be covered respectably with nickel and copper. One feels that the objection to this process is, that the dynamometer will, in any case, spoil the effect - apparently this could be got over by:- (a) Fitting the final pipes after the dynamometer test and before the road test. The Test Dept. would probably tell us that this will effect their records and performances. (b) To have the pipes covered prior to despatch. This seems to me out of the question, as it is certain to involve recriminations and delays and be a constant source of trouble between the O.O. and the Test Dept. In any case the whole issue wants thoroughly considering as to how it could be carried out and we should have to come to some understanding on the subject, as it is obviously useless going to some expensive process to give a finish and then practically spoiling the effect on a short dynamometer run, as the dynamometer would take almost years off the appearance, as compared with original road running. BY.{R.W. Bailey - Chief Engineer} By | ||