my group made three paper airplanes: furthest left: large body small wings |middle: small body small wings |furthest right: Small wings small body but weighted.
Our hypothesis was that an airplane with a large body and small wings would fly the furthest due to its length. Its overall straighter\ skinner design would help it cut through the air better.
During the experiment we learned that the biggest advantage to making a bigger plane was its potential for a larger wingspan. But we had cut out this part, rendering its larger body mostly useless. Another important aspect connected to our hypothesis was having the nose of plane be concise, compound and straight. This was not executed well when designing the planes. If we were to attempt this experiment again, I think a better effort in achieving better design execution would be the way to go.