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" The J-80 & J-80 I" 

" Boomerang" 

 
# 1 Start with a sheet of paper measuring 8 1/2 x 11 inch. or 21.5 x 28 cm in half. Red line indicates were to fold. See illustration.

# 2 Fold the top two corners down. See illustration.

# 3 If making the J-80 I ( indoor version) continue with this step. Fold top down 1 1/2" from bottom and continue on with step # 4.

If your folding the J-80 ( outdoor version ) see helpful hints. 


# 4 Fold down the top two corners as shown. Your measurements should be about 2" from center.

# 5 Fold nose up, crease well and then unfold. 

# 6 Fold nose down, crease well. 

# 7 Fold nose back up.

# 8 Fold nose over towards back of plane and crease well. 

# 9 If you turn your plane over you should now have this triangle showing on the back of the plane. See illustration.

#10 Fold your plane in half, making sure that the triangle in yellow remains on the outside when folded.

#11 Fold back the wing about a 1/2", this is shown in red. See  illustration on your left. Do the same for the other wing. 

#12 Unfold your plane so that it appears like the illustration on your left. Shown in red, is were you will fold over the wing tips about a 1/2". See illustration.

Here are some helpful hints: When folding the J-80 (outdoor version), you must make sure that the c.g ( center of gravity ) is correct for the plane to fly properly.
  1. In the illustration marked # 1 on your left shows the J-80 I ( indoor version).
  2. In the illustration marked # 2 shows the J-80 (outdoor version). the difference between the two is the amount of the nose you will fold over. The J-80 nose must be folded to the bottom of the page. 
  3. Important ! I use 75 pound paper to create this plane and it works very well, however size and weight of paper are not always the same. So in step three you will need to play around with the amount you fold over to make the plane fly as it should.
  4. Rule of thumb: If your plane flies straight and level, the c.g is correct. Have fun with the plane.
  5. If the plane tends to fly upwards and stalls, You must fold more of the nose over. 
  6. If the plane dives towards the ground, fold less over.  Return to step # 3. Or start folding step # 1

 


Congratulations you have finished your "J-80"

Make sure to see smoothing the lines special tips for this plane!!!

I hope you have enjoyed folding this plane. If for any reason you have problems understanding the illustrations or text, please let us know! In doing so, your comments may help others understand how to fold this plane more easily. Thanks, for suggestions use the feedback link below.

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Judson Lee. Designer and editor
Any coping of any material on this page is strictly enforced without the Designers consent.
Copyright © 1999-2002 jline Paper Airplanes. All rights reserved.
Revised: August 18, 2002 .

 

 

 


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