Answer:
First I would make controls for the experiment, for example:
-Each plane must be one piece of paper
-No tape
Then make categories for certain shapes of planes, for example:
-Folding longways or shortways (that's a word right?)
-Wing length between 6-8 cm is one category, 8-10 is another category
-Test if a folded nose or pointed nose of the plane works better
-Find professional designs and test which long-distance one is the best