Like cheesehawk says, if the aircraft rotate continuously it's probably a terrain friction bug, but if they turn and stop at a certain point it's a high speed crosswind (they turn into the wind and stop when they become aligned to it).
You can see this on the stock cross country mission if you select a Tiger Moth, it will yaw right and then stop after a while.
As for lockable tailwheels, i haven't yet found any aircraft in the sim that have one but i think it's done on purpose, many aircraft didn't have them in reality either.
|