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Malcolm Alexander Stewart Riach (1892- )
1922 F.R.Ae.S., A.I.N.A., Leading English Authority on the Theory of Airscrews; b. 1892; s. of Col. M. S. Riach, late Cameron Highlanders. Ed. Wellington Coll., Berks; Armstrong College, Newcastle-on-Tyne; Imperial College of Science and Technology, S. Kensington. Took up Aviation in 1911 at the London Aerodrome. Career: During the War, Tech. Adviser in Designing and Experimental Depts., 1914-15; Grahame White Aviation Co., Ltd.; 1915-16, William Beardmore and Co., Dalmuir; 1917-18, Boulton and Paul, Norwich; 1918-19, Cons. Engr., Inventions Dept., M. of M., under Admiral Sir R. Bacon; has carried out Private Research Work on Screw Propellers working in air, and the Helicopter Flying Machine; now engaged upon further theoretical Research Work. Publs.: "Airscrews" (Crosby, Lockwood and Son, 1916); "The Screw Propeller in Air" (Proc. Royal Aero. Soc., 1917); "A Complete Theory of the Screw Propeller" (Engineering, Sept.—Dec., 1919); "The Helicopter Flying Machine" (Aircraft Engineering, 1920-21); "Screw Propellers" (Aeronautics, 1920-21); "Steam Cars" (Times Eng. Supplement, Oct., 1920); "A New Theory of the Screw Propeller" (Aeronautics, 1920); "Soaring Flight" (Aeronautics, Feb., 1921), etc. Address: The Grange, Charlcombe, Bath.