Hi Robin; Well, from my standpoint, I have an existing KR-2 that uses the RAF-48 airfoil. The AS-5046 airfoil will fit the existing spars so that I won't have to replace them even though I will have to cut loose and raise my rear spar about 3/4" to match the new incidence angle of +1.75degrees because my horizontal stabilizer is already set at 0 degrees and I don't want to change it. If I were to go with the AS-5048 airfoil which is taller I would have to replace both spars with new ones. The AS-5048 airfoil at the root would be used if I were building from scratch and the AS-5045 airfoil would be used at the tip. The whole root wing from end to end would be the AS-5048 airfoil and the outer wing panels would be AS-5048 at the root and AS-5045 at the tip. I just don't want to go to the extra work of replacing my whole wing.
Posted - Wednesday, 02/07/07 4:02 pm Regards Myron (Dan) Freeman Indpls, Ind. 46203 USA mfreem...@indy.rr.com