I bought one just to see if a $20 RC Heli would actually get off the ground,..it did,sideways about 30 mph an inch off the ground,haha! Really pieces of garbage,only good for repair jobs on other heli's,skids,wiring,Main Rotor Blades are about the same size as a Blade CP 250-300 size heli,could work on a Fixed Pitch Heli. Really no more than a toy.not worth the plastic it took to make it.