RE: Carden 30% CAP and a DA 50?
Personally, I think that any 50cc engine is going to be on the low end for top performance on this plane. The 30% Cap will weigh in around 20 pounds. I would say try to put a 60 or 70 in it.....or if it will fit, the ZDZ80. The reason I suggest the ZDZ80 is because it has the same physical dimensions as the 60, weighs aboutthe same, and would provide you with an engine that could be moved to a larger airframe later on. I do not know if it would fit though.