Career
He had a long and distinguished career as a writer Stewart was commissioned a second lieutenant in the Middlesex Regiment in October 1914. He transferred to the Royal Flying Corps in 1915.
After a brief stint with 22 Squadron, he moved on in 1917 to 54 Squadron to fly a Sopwith Pup.
The victories came between 6 April and 25 September 1917. The Military Cross came on 17 September.
He then returned to England, was promoted to major in June 1918, and given command of the Aeroplane and Armament Experimental Establishment. He retired from service in 1921, to begin a new career as an aviation journalist.
From 1939 through 1962, he was the editor of Aeronautics magazine.
His books included Aerobatics: A Simple Explanation of Aerial Evolutions, Of Flight and Flyers, and his autobiography, Words and Music of a Mechanical Manitoba