Hang gliding involves launching non-motorized gliders from high altitudes using only wind currents to remain airborne. The document describes how to build a simple hang glider model using materials like newspaper, scissors, tape, and wire. It then details experimental procedures to test the hypothesis that a hang glider flies due to aerodynamic forces that create lift. The experiment found that the hypothesis was correct, as the hang glider model was able to achieve controlled flight when launched from height. Precise measurements during construction proved important for stable flight.

2. Introduction
Hang gliding is an air sport that uses non-motorized foot-launch air craft
Hang gliders are like a large kite, where it flies depending on the height it
launched and the wind speed
Usually made out of aluminum alloy or composite frame covered with
synthetic sailcloth
Launch techniques include: high altitude and ground-based tow system
Training and safety is necessary for hang gliding sport.

3. Question:
How do hang gliders fly?

4. Hypothesis:
The hang gliders fly because of the down force of air
makes the glider lifted up. Once the glider is released
in windy condition, it will flip back. Also a glider
cannot fly without any weight in it. It is because the
weight will bring the force downward.

5. Materials:
A template of hang glider
origami
Scissors
Newspaper
A masking tape
A Ruler
A twisty wire

6. Procedures:
1. Cut off the template over the newspaper
2. Use the ruler to fold the paper through the dash line
3. Measure the elevon to be 20° from the grown
4. Tape a wire onto the glider for its mass. Use the front weight
gage to measure it.
5. Curl a little bit of the wire’s tip.
6. Release the glider from a high altitude.

7. EXPERIMENT

8. Conclusions
The hypothesis was correct. That
a hang glider flies because there
is a aerodynamic forces that
cause the glider lifted up.

10. Reflection
The experiment was not that simple. We need to be
really precise on measuring the angle and try to be
careful to not adjusting the angle. It is because once
we accidentally change the measurement there
would be some problems with the the gliders. Such
as the glider would not fly smoothly, it flipped etc.

11. References
http://www.madehow.com/Volume-5/Hang-
Glider.html
http://en.wikipedia.org/wiki/Hang_gliding