Christian,

nicely done! It's nice to see my brainchild come to fruition. The scaled Tipo's were an idea and project I had some five years ago or so. I also have cores for this bird and wanted to build one as an all electric model one day using vintage Kraft e-tracts. Given their hefty weight, they are ideally suited to this larger bird. However, I'll probably build a 30 size 50" span version instead.

Ehsan,

the scaled Tipo's are exactly that. Their airfoils, unless requested differently, are scaled down (or up in this case), versions of the original 60. As such, the percentage thickness is the same on all versions. I think it is a ~16.8% foil if memory serves - thick!

David