I've got plans for both a Sopwith Camel and a Fokker Triplane, 35-40 size. Both are pretty much scale outlines, although the wings/cockpit were moved back about 1in. for balance reasons. Both designed by Pete Simonson, Minneapolis Piston Poppers, around 1970. A few years later he flew a scale DeHavilland Gypsy Moth at the Nationals, circa 1972, I believe. Both would put up a nice pattern using an Enya 29.
The plans are on my drawing list, since they are original pencil drawings.
Phil C