A Glider that Flies Extremely Well
I teach engineering at a High School academy and promote aeronautical engineering with a PLA Glider CAD and flight challenge. This glider, designed for the month of October, flies better than anything I've printed before but you have to print it in a good quality PLA with .25 layers,1 or 2 perimeters and top bottom layers, and between 10 and 25 % infill.
Love it, change color after the first layer if you'd like,
but know that while Simplify3D will dial the first layer,
that first layer must be rich in material and laid down on the bed a bit smoooshed so it adheres to itself and creates a strong, fused bottom layer. Fly it with hand and bend the entire fuselage a bit to enable more or less lift.
DC aka vinchlet
1-2 walls or bottom or top layers