A Lockheed Martin Technical Fellow, Dr. Leland M. Nicolai wrote a technical paper on the SAE-AIAA airplane design parameters.
It was on the SAE site, but I see it's vanished..
I uploaded it to one of my sites:
"Estimating R/C Model Aerodynamics and Performance
2,010 KB.. Sorry 'bout that...
It takes the design from the first pencil scratch to takeoff.