Lance -if you can make it light enough -the airfoil can be anything -
add enough power to that and the cg can be anywhere--sounds goofy but I can proof it.
for models - the working parameters are really a LOT different than what is used on almost all man carring stuff - simply because the defined task is completely different.
for many models - a simple light slab is just fine -as long as it holds it's shape.
much of the rest of it is whimsy.