hi all

i was wondering how big should the cut outs in the front of the cowl and the out let in the back of the cowl be to provide adequate cooling for an engine ... cos i was running my saito 82 the other day in the flip 3d ... did a few flat spins at constant hight ... at about 3/4 throttle ... and when i tried pulling out .... it had not power what so ever it had overheated in the proccess ... i ve seen guys hover for like 10 minutes with no problems what is the secret ???

please help