The stall speed on a 4* is a very slow walking speed which is probably down around 3 mph! Any faster than that and the plane wants to keep flying and also it doesn't like to lose altitude and thats what I don't like about them. Throttle up however and its a pretty fast plane with a 40 and a screamer with a 46 on it. The reason a lot of flyers like it for a 2nd type plane is that if things get carried away, you can throttle way down and just fly around very slowly until you catch your breath without worrying about it stalling out on them because the plane has such a low wing loading. [8D]