George, I don't think you'll find a Sterling Yak-9 plan. The kit came with a small-scale 2-view on the instruction sheet. I took my plans to a copier several years ago and just had it copied at a magnification that gave it the correct span. If you want to fly OTS with something built from such plans, that should be legal, since it was "published." The only scans I have now were scanned at a low resolution to fit the other Forum, but I'll the jpeg version below, if it would be helpful. I can find my kit plans and scan at higher file size, if that would be useful. I also scanned some kit parts and the rib openings left from the die-cut wood, but these would not necessarily come out at the right size. However, if you look up the span (it's not on the box, but was in ads of the time - 38" or 40", I think), you can scale everything. The problem of magnification is that it also magnifies line widths and irregularities. BUT, you can build reasonably from such magnified images.
Topic: Great plans site (Read 2831 times)