Stealth Glider Concept I designed in Blender for the Printables contest! 

Use the least possible material, so it comes out light! 
I recommend 0.12 layer height, with no more than 2 walls, and below 4% infill

For optimal flight/gliding it needs more weight on the nose, so gradient infill.

Recommended print orientation is on the 4th picture
 

If you have any questions, need help or want any custom 3D designs, send me a message!