ROLLS‐ROYCE AND HIDUMINIUM High Duty Alloys, Ltd., are responsible for a considerable portion of the material in Aluminium alloy used in the Rolls‐Royce Kestrel and Buzzard engines. They produce the Y‐alloy for the forgings from which the pistons are made, and also the material for castings for the cylinder blocks, of the production of which Mr. Handasyde speaks in such high terms of praise. This is an alloy known as Hiduminium R.R.
(1931), "Recent Technical Developments: High Duties Alloys—Pobjoy Engine Components—Light Castings—Sheet‐Metal Screws—Technical Journals", Aircraft Engineering and Aerospace Technology, Vol. 3 No. 12, pp. 326-326. https://doi.org/10.1108/eb029493
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