This is my lay out for my 56'' hydro (cat) that runs on a pair of SSS5694 1200kv running on 8s through 280 amp flier esc's the prop are stainless 1755/3 props. If this is to big for the class I have a 42'' that runs on a pair of TP4050 3Y 2220kv on 6s that uses magnesium X945/2 props with 180 amp esc's that will do the job. I'll even use a standing start to make it fair.