Very fast, long range and stealthy, the UltraDelta is likely my most advanced flying wing paper airplane to date. This airplane was designed to replace the Super OmniDelta and appease viewer's wishes for new delta wing paper airplane too. I am quite proud of this paper airplane, because it is not a development of any existing model and its characteristics are so excellent. I am sure it will please others just as much.
TAA USAF Designation: F250-1
Step 1: Materials
1 Piece of 8.5 by 11 inch Paper
Step 2: Width and Corner Folding
Take your piece of paper and fold it in half width-wide. Then fold each corner down as shown.
Step 3: Airfoil and Counterweight Folding
Fold the tip of your airplane to the rear and make a crease. Then pull the leading edges of the paper towards the center crease and make a crease. Once you've done this on both sides, unfold the paper. Then fold the swept edges in towards these creases. Fold the rhombus in the center forward as shown. Then fold the wing leading edge sections down over the triangle.
Step 4: Making the Fins
Fold your airplane up in two along the center crease. Measure and mark 0.5 inches in from the trailing edge along the center crease. Then measure and mark 0.75 inches outwards from the center crease along the trailing edge. Then measure 0.75 inwards from this mark and make a line this long. Connect this line to the mark you made along the center crease. Cut along this diagonal line.
Step 5: Taping and Fin Folding
Unfold the airplane and cut along the center crease to the half inch mark you made earlier. Then tape along the airfoil sections as directed. Flip the airplane over and tape where designated. Then fold your fins upwards, parallel with the center crease. Pull them away from the center crease and align their trailing edges with that of the wing. Then crease their bottoms.
Step 6: Flight
The UltraDelta is a very fast flying wing paper airplane that can fly very long ranges. Launch technique counts, but is fairly simple. Hold the UltraDelta between its fins and toss at moderate speed. You may need to pinch the airfoil sections to make them thicker from time to time, but do so equally or as needed. Additional surfaces applicable include air brakes, decelerons, elevators, ailerons, elevons, flaps, and rudders. Enjoy!