Kangke make two Monocoupes, both are the model 90A. They have a 1/4 scale with a 96 inch wing that I fly with a RCS 140 gas engine and it has all the power it needs. The RCS 140 has about the same power as a good 120 two stroke. It weighs 13 pounds 13 ounces.
My son has the Kangke 1/5 scale with a 76 inch wing. His is powered by a Saito 100 and it also has as much power as it needs, in fact his vertical is better than mine. But a Monocoupe going straight up just doesn't look right. His plane is around 9 pounds.
The large one has flaps, they are a builder option on the small one. My son did not use them and his roll is much faster than mine. With the flaps down the big one actually lands slower than the small one, but they both land slower than most trainers. They are both fun, both fly very well and are beautiful in the sky. Quality is outstanding, fiberglass and paint are some of the best Ive seen. Even the small one has a two piece wing on a tube, a nice feature for a 60-90 size plane.