RE: Delanne Cannon-plane
The Delanne duomonoplane was featured on the cover and with an article in an old Air Trails magazine. It was actually fairly successful. The British converted a Lysander to this design and test flew it with good results. Bert Streigler has published a couple of construction articles for RC duomonoplanes. Sorry, I don't know where. There was CL constructon article by Calhoun Smith in the October 1950 Air Trails. Also a free flight power model published somewhere, called, I think, the Alky II.