Nathan:

that's right, the more you push the stick up or down the faster the servo turns. and with a winch servo you don't have left and right, you have roll in and roll out or the sheet, just like a real boat has, you let the sheet in and you let the sheet out.

HobbyBob:

how much travel you need depends on th size of the landyacht, the reason i like the winch is that i can centre the stick and the sail stays where it is, it doesn't return to the centre like an arm version would. it also means that you are not consantly draining your batteries. an arm servo is drawing power whenever it's not centred.