Foamy jet are ok to start with, just keep it mind that, they don't last more than a season, maybe two, and the control surfaces are not rigged for the speeds that a turbines provides, I've seen this first hand, I was training one of our members with his foamy jet, on the first flight, it came with the rudder's pushrod completely off the the clevis, needless to say, he replaced all of the plastic and metric pushrods.