I have seen a couple of these fly and they are very good design. They can be powered by several engins with good sucess. Supre Tigre 60 or 56 or 51, Merco 61,Magnam 53, Moki 51 or even a K&B 61, 56 saito, 50or 62 Saito, for strokes or any of the piped motors that are available. I have a friend that had a out of the box Supre Tigre 60 in his.It flew good. Leo