I'm hoping to get some advice on the steering servo for a UAV-3000. Other people seem to be using really big servos (10kg-cm or more), and I'm having a bit of trouble understanding why. As far as I can tell there should be next to no torque applied on the wheel during takeoff/landing (mainly because the strut is vertical, so there's no arm for the torque to act around).
Could someone clarify whether I actually need a big servo here? I've got a fancy Hyperion DH20X coming at some point, but it could be a while - and I've got a brand new HobbyKing HK15138 here that's just waiting to be used for something.