Balloon Helicopter

1.Introduction: The balloon powered helicopter shows students about properties of air pressure and flight, but also allows students a chance to practice basic mechanical construction.

2.Materials: -Ballon(s)

-Blades(3)

-Base with whistle tube

-hot air

3.Procedure:

1- Connect the 'blades' to the 'whistle' . Make sure sure all blades are facing the exact same direction. Slide the ends(red part) of the blades right into the grooves so it looks like the picture below.

3-Now blow up your balloon. (yes, while its connected to the blue thing). Blow into the end of the blue connector (the part sticking out) and blow up your balloon. Make sure when you have it blown up to a good point that you pinch the end ad hold it firm so you don't release any air.

2-Slide the blue connecting piece into your deflated balloon. make sure the larger end is placed inside the balloon tip.

4-Slip the whistle right into the blue connector (it fits), but make sure you are still holding that balloon firm so you aren't losing air.

5-Then when you are ready, go into an open space, throw up the balloon and watch it fly.

4.Scientific Principle

Majority of the helicopter's reason of flight is based on Newtons third law. Blow up the balloon and attach the hub to the blade assembly and this jet reaction copter is all set to soar! With fresh balloons, it will fly 2 stories high. 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.

5.Safety Regulations :

DON'T do procedure in a small room!

Keep the helicopter AWAY from face!