Ron Smith wrote: >>If you build the as504x spar according to Marks outline, he says that it is stronger than the orginal design. <<
That applies to the AS5048, but not the others. That's only because the spar caps are further apart. You basically have a beam that's taller, therefore stronger, due to the increased thickness of the 18% AS5048. Mark Langford, Huntsville, Alabama see homebuilt airplane at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net at http://www.krnet.org/info.html