Many years ago, Ken Williard published a set of general ratios for designing RC aircraft. I think I still have a copy of that data sheet.
Send me an email ([email protected]) and a fax number, or address and I'll get a copy to you. I still refer to this from time to time.

Used to live in Tucson - moved there in 1957 and left in 1973 to go to Flagstaff to NAU.

Hope this helps. By the way, here are some pictures of my latest scratch built - a big ugly stick. Wing is 78" Chord is 22" Airfoil = semi-symmetrical Selig 8036, Fuselage = 68 1/2". I have a Homelite 25cc weedeater engine on it now, but am trying to buy a RCS 44 twin cylinder engine for it. As you can see - still have some work left, but hopefully will fly in 3-4 weeks????

Regards