I have a Dragon Lady ARC I bought a few years ago before they quit producing them. Originally, they flew on a Maloney 100. On the front of the box my DL came in, was one with the Maloney 100 gas engine. You talk about bad power-to-weight ratio. It says you can use up to a 1.60 4 stroke. I have a Saito 130TD twin in mine and it flies very nice. It has plenty of power. However, the nicest thing about it is the 2 cylinders hanging out of the cowl and the sound is excellent. Boy does it turn some heads at the field.