Invictus is among the most brilliantly engineered planes on this site. It looks amazing and flies up to 90 feet, but it’s stand-out feature is its locking mechanism (innovated by legendary origami designer, Michael Lafosse) that holds the plane in a 3-dimensional form so that it won’t unfold in flight. This makes Invictus more aerodynamic than most paper airplanes and leads to its excellent range.