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).
Letter from High Duty Alloys Ltd. providing technical data on magnesium alloy forgings for propeller blades.
| Identifier | ExFiles\Box 116\2\ scan0141 | |
| Date | 27th February 1940 | |
| 1020a HIGH DUTY ALLOYS LTD. TELEPHONE: SLOUGH 21201 (PRIVATE BRANCH EXCHANGE) TELEGRAMS: ALLOYS, SLOUGH. DIRECTORS: W. C. DEVEREUX, F.R.Ae.S., (Managing) DUNCAN McKELLAR. Our Ref JTR/WP. Your Ref Rm.{William Robotham - Chief Engineer}3/ML. Technical. 89, BUCKINGHAM AVENUE, TRADING ESTATE, SLOUGH, BUCKS. 27th February, 1940. Messrs. Rolls Royce Limited, Nightingale Road, DERBY. For the attention of Mr. W.A. Robotham. Dear Sirs, Mr. Devereux has handed me your letter of the 20th instant to reply to and I note that you are desirous of obtaining some information relative to magnesium forgings. In my letter to you of the 22nd December I quoted typical figures obtained on forged magnesium alloy, as used in the manufacture of magnesium propellor blades, which I would again quote as follows:- 0.1% Proof Stress - 12/14 tons per sq. inch. Ultimate Stress - 19/21 " " " Elongation: - 8 to 10% These figures are readily obtained on a production basis on magnesium propellor blades supplied to Messrs. Rotol Airscrew Ltd., I have pleasure in also enclosing you herewith Data Sheets covering our Magnuminium series of Magnesium alloys, which I trust will be of interest to you. Yours faithfully, For and on behalf of HIGH DUTY ALLOYS LTD., [Signature] Technical Superintendent. | ||