Instructables
Picture of How To Make The UltraDelta Paper Airplane
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
 
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Step 1: Materials

Picture of Materials
Required:
1 Piece of 8.5 by 11 inch Paper
Tape
Ruler
Pencil
Scissors

Step 2: Width And Corner Folding

Picture of Width And Corner Folding
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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

Picture of Airfoil And Counterweight Folding
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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

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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.
rimar20002 years ago
Nice glider, but pardon, I don't understand well the launch technique (I don't speak English, maybe that is the problem).

You say "Hold the UltraDelta between its fins..." but the surface between fins is an horizontal plane. I always threw paper airplanes taking them by its vertical part. Should I bend it, or should I change the position of my arm?

Thanks in advance.
OrigamiAirEnforcer (author)  rimar20002 years ago
This picture of the similar OmniDelta should convey the message. This is how the UltraDelta should be held and launched.
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OK, thanks and happy Chistmas!
merry
Why did you say that? Both are correct and proper.
Thanks Robot, that reassures me.
Thanks and pardon, I don't speak English.

Can you explain me wy not to say happy Chistmas?
hehe I say happy Christmas too and I speak English.
andrew81721 year ago
Can I have permission to make a tutorial on youtube? I will give you credit.
OrigamiAirEnforcer (author)  andrew81721 year ago
You have my permission to make a tutorial of the UltraDelta on YouTube; please attribute its design to me and add a link to this instructable in the video's description.

Please send me a link to the video too! :)
lislis3821 year ago
I followed the guide and launched it the correct way but it keeps turning to its side and failing what should I do
OrigamiAirEnforcer (author)  lislis3821 year ago
Try pinching the airfoil on both sides again equally. If this does not remedy to the banking issue, true making a small elevon on the wing that is dropping and experiment with trim.
I made this and it is awesome but didnt have enough room to fly it so it kept messing up the fins so i built a stabilizer on the fins to hold them in place and ensure strait flight

its about 2 inches by .5 inches
Photo on 2012-08-20 at 16.42.jpg
Is the stabilizer made out of another piece of paper, or the same as the rest of the airplane?
i added a few more folds to make the plane more dart-like due to my lack of space and the results are rather neat-looking and easier to launch
i folded up the wing tips for stability and folded in the wigs to an interior angle of 30
degrees as opposed to the previous 90
and i am using the tape stabilizer which creates a neat looking circle above the plane

Photo on 2012-08-21 at 16.46.jpg
It'd be wonderful if you'd make an instructable on the new variant! :)
It is another piece of paper in the photo but i later made one out of two pieces of tape
i like Happy Christmas more!! something different! i speak english.