I have a H9 Edge with a Saito 180 with a 17 x 6 APC prop. On Heli 30% fuel, you couldn't ask for more power. I also fly a H9 Cap 232 with a Moki 180 and the Edge has just as much power and really has the low torque needed for the 3D stuff. I have never used anything else but the 30% fuel so how it would be on 10-15% fuel I don't know. With the 30% heli fuel (which is Horizon's suggested fuel for this engine), the engine idles perfectly and transitions great. Looks and sounds great too!