I had a similar version from CPM models (probably built in the same factory) with a Saito 7cc (0.40 cubic inch) 4 stroke. No an excess of power, but it flew scalish and was a joy in the air. This is still a war plane (albiet well behaved) and will drop a wing if you are too casual. I lost mine in a too casual turn to landing approach. The wing dropped and it went into the ground. Anyway, it is a sweet flyer, but keep an eye on it.