This sketch of crew members in Leaside, near Toronto, shows them receiving training in the correct procedure for starting the aircraft engine by "turning over" the propeller. While pilots and observers received much of the glory and faced most of the danger in the British flying services, thousands of ground crew maintained the aircraft at airfields behind the frontlines.
Sketched by Charles William Jefferys
Beaverbrook Collection of War Art
CWM 19710261-0227
Canada and the First World War
