I too have wondered this for some time. I'm not sure why some servos are listed specifically for helis, cyclic etc., when the stats seem worthy of other uses as well. What I can tell you though is that some servos are specific to helis in that they operate at higher frequencys that require a gyro, if they are fed the frequency from a car receiver they won't even work/operate! The protek 250T is not one of those however. I would say if you can't get a direct answer on here, send a message to A Main about it and see what they say being that that is their exclusive brand. Maybe they can give you more insight. I remember another person a while ago saying that basically it doesn't matter, that the servo has no idea what it is being used for, it just does what it's supposed to!