Just to see if it's possible, I designed this front wing meant to be strong enough to fly without any lamination, straight out of the printer. The wing has two embedded 42cm 8x8mm square stainless steel rods.
Surface area 1000cm2.
-3 degrees washout towards the tips
Weight 1400grams (900grams of PLA + steel rods...)
Mounting hardware: M8
The wing has 8x8mm stainless steel rods inside, but I made the holes 8.5mm, otherwise was very difficult to insert the rods. I had to hammer the rods into the middle part (which was printed with 8.2 mm holes).
I and a friend of mine flew this wing. It performs very well.
There's a slight problem, though. I weighed the wing again, and it's 1600 grams now. It's taking in water. So it should be painted/sealed before using it.
ABG Cheapest PLA i can find.
4cm wide part where it mates the fuselage:
%60 infill, 5 perimeter shells.
The rest of the middle part, and wing tips
%20 infill, 4 perimeter shells
All parts were printed with a wide and thick brim.