Okay, I guess I can buy the idea of a stressed skin construction. I am used to the idea of the spar being the load carrier, with ribs there just to give shape to a light covering.

Nevertheless, it does seem to be a heavier form of construction. I'm comparing this to something like the Great Planes Extra 330L, which had a proper I-beam spar, with light ribs, capped for strength. This wing would carry a much higher load, but weighs less per unit span than the PICA method.

How do these kits fly? Does anyone have other experiences with PICA kits?

STeve