http://www.vintagewings.ca/VintageNews/Stories/tabid/116/articleType/ArticleView/articleId/484/language/en-CA/The-Mother-of-All-Drones.aspx
A profile drawing of the very same de Havilland DH-82B Queen Bee as used in the demonstration for Winston Churchill. Note the red undersides of the upper wingtips – applied to later production models and used to help gunners see the angle and direction of flight at a distance. A steam catapult was used when the aircraft was launched on floats. Image via WingsPalette