On paper airplane competition:

• What type of paper is the best to use? Any 8 1/2 x 11 inch white sheet of paper can be used. A thicker paper, such as, photo printer paper provides for better creasing and alignment.
  
• How do I make my paper airplane perform loops and curls? For most planes, fold the tips of the wings up slightly. Do not bend too much or your plane climb slowly and then will come to a quick crash.
  
• What happens if my paper airplane flys to the left or the right? Make sure the center body of the plane is straight and aligned.
  
• Why does my paper airplane crash so quickly? Much of the time your paper airplance was not folded tightly causing too much drag on the unaligned body. Make sure to make tight folds, which create a streamline flying machine!
  
• How can I get my paper airplane to fly higher? A trick is to throw ______continued.

  Interesting article on paper airplane competition:

  Great Flying Tips For The Paper Airplane Enthusiast!
  By Sara Gray
  Okay, so you’ve mastered the art of making paper airplanes, now it’s time to learn some great paper airplane flying tips to make them fly better than ever.SpeedBecause the Read more...
  
  More on paper airplane competition:

  continued______ the plane in the direction of the wind blowing towards you. It will actually lift the plane upwards and may even levitate for a bit, but will not give you farther distance.
  
• How can I get my paper airplane to perform dives? To make your paper airplane dive, go quickly down towards the ground then pull up before crashing, hold your plane as high above your head as you can or throw off of a high area. Good places can be your balcony, stairs or even a stadium. Make sure you fold the tips of the wings up, then point the nose DOWN towards the ground and drop the plane - don't give a thrust.
  
• How can I make my paper airplane perform a backwards dive? To make your plane fly down then loop upside down and backwards, hold your plane as high above your head as you can or throw off of a high area. Good places can be your balcony, stairs or even a stadium. Make sure you fold the tips of the wings up, then point the nose UP towards the sky and drop the plane - don't give a thrust.

Another decent article on paper airplane competition:

Was A Paper Airplane The Best Toddler Toy Or What?
By John Myron
Growing up I considered myself somewhat of an expert at making paper airplanes. It was a lot of fun. Sometimes, my friends and I found ourselves in trouble as a result of a paper airplane flying Read more...

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