How does an airplane lift off the ground? Learn how planes use lift and thrust to fly, then make your own paper airplane catapult. Design Squad is available to stream on pbs.org and the free PBS ...

Airplanes can't gain enough speed to take off on their own over such a short distance, so they get an extra boost from a type of catapult (not the big wooden kind you might imagine flinging stones ...

Paper Airplane Machine Gun V2.0 January 10, 2017 by Donald Papp 40 Comments A little over two years ago we posted an amazing contraption that holds a stack of paper sheets, folds them into paper ...