i have a plane with a 90" span an 11" chord, using an os 61 fx engine, won't change this, but could change the following

for my servos i am thinking that the elevator servo is going to be about 90 oz/in, ailerons at about 54 oz/in, and rudder at 45 oz/in
the elevator is going to be 3" by 30" and ailerons at 2.75" x 18" and rudder of 3.77" x 15".

i am not looking for high performance, all i want is to be able to take off and land. trying to carry as much payload as possible. can anybody give me an idea of whether or not these servos will be able to handle the loads. I used the servo torque calculator on coloradogliders.com but something doesn't seem right here.