Poaks,
I have a YS 120 on mine and I run CP 30% Heli fuel in mine and it turns a 17X6 Zinger at 9,800, but the performance on the Katana is very lackluster. I have never weighed my plane, but the plane is just too heavy. The problem is it took 18 oz. of lead to get it to balance!!!!! Yes, 18 oz. I added nothing and and put the throttle servo on the firewall. It is a very tail heavy plane. My friend put a Saito 150 on his and he added the same exact amount of weight.

The plane flies fine, it just will not hover. It does a lot more than barely fly, but you can almost save a pound by putting the rudder servo up in the fuse and making it a pull pull. I am leaving it in the back and putting that engine on something else and putting a moki 180 on it

Norman Ross Jr.