No, it was the wingtip (1/3 of whole span) of a modern composite hangglider. Total weight of glider would have been 55kg.looking at your wing test.....155kg 6 G.....backward calculation gives me a gross weight of 51.6 kg assuming that is one wing half.....is this a model?
You may want to read BoKu topic on carbon max. Same ribs is done just by hot gluin some strips of PE foam to skin.I suggested my team to experiment making kind of beams that run along the skin on the composite wing. I was inspired with a alu tube wing. There you don't need to have full ribs. So i thought "Why not try this in a composite wing?" and it worked.
Give me your email.The foam core absorbs lots of epoxy in infusion processes. Would be very interesting to evaluate the physical properties of wrinkled/zigzag ribs. I mean, like a cardboard but without the inner and outer layer. Such a rib could be infused nicely in one step and without core.
I don't recall is we set goal for pilot weight to 100kg. But it could have been. Could have been 90kg pilot too.155kg gross weight?...