Not true. If your swashplate is centered the heli will hover fine. But the servo's can only move so far in either direction. So if the arm isn't centered at the servos mid point, you'll have an excess of throw in one direction and a shortage in another. It could be something else entirely, but wouldn't hurt to check. Also make sure your Trans batteries are good. I flew mine down till only the red chicklets were lit, and some really wierd stuff started happening.