Lou has finally hit the nail on the head!!!

After discussing a little bit of my knowledge, I have been sitting back and keeping up with things that have been posted here. What I have said doesn't seem to be contested, and it seems that for one reason are another, people have been getting more into theory than actual practice of designing an efficient high lift/ low drag wing.
First and formost, we should look at the big picture wing. A 2D wing is ONLY for theory! This is a statment that was taught to me the first time I started in Aerospace Engineering. The only thing a 2D wing is used for is discussing the effects of all the different types of things that happen to a wing while in flight. As for practical uses, a wing must have 3 things to make it useful as a wing! LENGTH, WIDTH, AND THICKNESS. This make ANY practical wing design 3D!!!

Lou has said a PERFECT statment that I have stated in another way! Most RC airplanes are OVERPOWERED!! If you don't believe me, look at it this way. As an RC designeer and pilot, what is the SINGLE thing that we CANNOT scale down from the full size planes??? Answer is THE ATMOSPHERE!!!! So, for the most part RC engines are by nature greatly more efficient than the full size bretheren for the size of the aircraft to be used on. A close way to get it to the right power to weight ratio is to take a 1.80 size aircraft and place a .40 on it! An example of this is the Piper Cub! Originally had a gross weight of close to 2000 lbs, with a 65 HP engine! This gives roughly 30 lbs/ 1HP as compared to most .40 size aircraft of 5lbs/ 1HP!!!!!

This being said! There are to many factors that go into the design of a wing for different types of operations. A more specific question should have been asked I agree! But again, for RC purposes, unless you are trying to design something for a VERY SPECIFIC purpose, IT DOESN'T REALLY MATTER!!!

JUST HAVE FUN AND EXPERIMENT, EVEN A BAD DESIGN WILL GIVE YOU INFO FOR YOUR NEXT ONE!!!

Relax, you don't have 138 people sitting in this airplane with their lives in your hands that you have to design a GREAT, RELIABLE, AND TOTALLY EFFICIENT wing! You are only going to have to worry about the ribbing your fellow pilots will give you when you bury the thing into the ground and throw balsa all over the runway!

Relax, have Fun, and the rest will take care of itself!

Thanks,

Reg