I am just begining to start into the bigger aircraft. I am starting with a 90" RoadRunner and am wondering if anyone has any recommendations on a siz/type/maufacturer that I should start looking at to buy an engine for this bird. I have primarily flown the .40 - .60 sized 2 cycle stuff so this is a new area for me. I want to try to keep costs down (who doesn't!) and have toyed with the idea of a gas engine but I don't really know where to start. Any help would be great! Thanks!