kfloyd111

A Brillelli 46cc would be a good fit for this plane. Here is the web site. www.brillelli.com Scott is one on the best guy's you will ever meet. He makes this 46cc with magneto or EI. Either model will do the job. He has a video off this engine flying a Christen Eagle that is about the same size as the Ultimate Bi-plane you are looking into.

Good luck and have Fun