ORIGINAL: rrudytoo
vasek,
There is an RCV 120SP up for bid on eBay now. As I write this there are four days remaining and the bid is up to $202. According to the information the engine's owner provided, the RCV 120 can swing a 15.5 X 12 four-blade prop. He used this engine in an ARF Hellcat with a 72" wingspan and said it flew his plane well. And, no, it's not my engine.
The one on e-bay looks like one of the earlier versions. The design has been improved a bit over the past 3-4 yrs. Before bidding, you might ask how old it is and then ask about the issues you "might" run into on the RCV Support forum.