Mine originally had a early model Zenoah G23 two port (Kalt 22) which were anemic devices. It turned a 16-8 at 7000 which is 1000 rpm less than the later G23. The airplane flew but it was obvious that it was under powered. The climb wasn't very steep.

So I would assume that it would do well with one of Scott Ellington's engines. The smallest he has right now is the 26 and it would work fine.