so we are about to fit out 2 large planes with servos and the question has come up about how much torque is really required.
the planes in question will both 100cc size, 1 is a aus star 120inch Cessna 182 and the other is a 104 inch sukhoi.
Now i know if money and sense will let us we would be putting 7955 servos though out both but at over $100 a servo we will need to take out a small loan to buy them. both plane need 8 each so thats alot of money on just servos.
i have seen plenty of 35% 3d type planes like the suk with 2 5645 on the ailerons. thats about 320 oz of torque per side being 2 on each. i can only assume this is enough as people seem to be doing it?. aswell the rudder will be setup for 2 servos so how much torque is really need if i did 1 7955 thats 333 oz torque or 2 5645 lets say that comes in near the 320oz so not much different. i can not see the need for 2 7955 that being 666oz torque? bearing in mind this plane will be flying 3d?

now the cessna only has rather small surfaces and will only be doing scale type flying how much torque will it need. surly it wont need 7955 though out. the flaps might need a bit more than say the ailerons. but have no idea where to start with how much torque would be needed in the first plane?
can someone with planes in this size let me know what they are using and how it works for them?
thanks in advance custard