Hi,
I am building a new sailboat. It is 44 inches long. I don't know how high the mast should be because it does not say on the plans.

What torque should the servos that control the two sails have (the front and the main sail)???

And how do i control the sail to have enough movement??

The rudder is under the hull. How do i waterproof the shaft coming in the hull?????