Let me preface this next question by saying that I am just thrilled that this email list exists (thanks Mark and John), that this community of true experimental builders exists (thanks to all of you) and, most importantly, that there is a small group working on the plans and construction manual for the KR's successor, the FreeBird. This is what the EAA, to me, is all about!
In this class of aircraft, I have interest in the three wooden/comp birds -- the Falco, the Osprey GP-4 and the KR2S/FreeBird. The Falco already has a free set of plans and a construction manual. http://seqair.com/Store/Plans/Plans.html I am also interested in a spamcan, the Mustang II. I'm a fan of the KR2S/FreeBird for many reasons, especially the simplicity and efficiency. I am not a fan of the airfoils used on all three of those other planes. I prefer my laminar airfoil to be safer and, thus, a little thicker and a more benign stall character. Harry Riblett's ideas/work on airfoil design seem to have spread over the decades since the publishing of his messy book with many kit companies (e.g., Zenith, Kitfox, Bearhawk) switching to his improved airfoils. This is the golden age of experimental aircraft with so many free open source apps (and free/student versions) such as XFLR5, PROFOIL, OpenVSP, FreeCAD with the OpenFOAM workbench, NetGen, Ansys Student, Solid Edge, and the Raymer spreadsheet that comes with his book. I am like a kid in a free candy store! I know that about halfway in the KR2 lifecycle, that Mark L led the way in getting an improved airfoil designed. That is something that ought to have happened with the Mustang II, in my view, but has not. It takes a leader. Paser was not interested in greater safety, but rather performance and efficiency. And that brings me to my question for Mark or anyone else that has the answer. I found your page, Mark, http://www.krnet.org/as504x/design.html and there is some great info there. Do you or anyone else have the raw data from the wind tunnel tests? Is that something that can be shared?
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