RE: PL-12 Airtruck
First thing I tried was the lower wing. I cut the ribs out of the plans and glued them to a piece of 3/16 poplar wood. Then drilled thru it and added a second peice and bolted them together. They were then cut out of the poplar and sanded to shape. I them unbolted them and sandwiched balsa sheets sheets between the two peices. The stack was then sanded to mathch the poplar templates. The upper wing ribs were done the same way. I then laed out the pieces per the plans and here is what I ended up with. Once every is all built it will get fiberglassed and painted.