An amazingly simple but extremely...
An amazingly simple but extremely effective way to demonstrate Newton's Third Law. Simply snap the blades on the hub, place the balloon on the collar, inflate the balloon, and you're ready for lift off! When you release, air travels through the blades, causing them to spin. Lift is created and off it goes! We've gotten these to fly over 20 feet high. Blow up the balloon again to relaunch.
3 x propellers
1 x propeller connector
2 x balloon
1 x balloon connector
What Does It Teach?
Newton's Third Law has to be applied twice in order to explain the upward motion of the helicopter. The exhausted gases force the fan to rotate, driving the air downward. The reaction of wind, in turn, provides the lifting force for the helicopter.