1. Group 935 Egg Propeller Experiment By: Patrick Ovesen Collin Still Team 21

2. TITLE • Purpose • Backround (research and pictures and Summary) • Hypothesis and test • Results • Analysis • conclusion

3. Purpose • The purpose of this experiment is to see how many rotors on an egg will slow it down by creating drag and lift to decrease the amount of damage on the actual egg itself.

4. Background • When a helicopter’s engine fails it will not drop straight down. This is due to the autorotation of the rotor blades, this rotation creates lift which slows the helicopter down when falling. • We dropped the eggs, one with 4 rotors, one with 3, and on with none as a control group. • (We were unable to upload pictures due to Wi-Fi connection problems.)

5. Hypotheses and Tests • Our hypothesis was that the egg with four rotors would be the last egg to hit the ground, as well as being the one with the least damage. • We thought this because the more rotors the more area there is for air to hit the rotors to create lift and drag.

6. Results 4: 9.30s 3: 7.56s 0: 4.96s 1= Perfect Condition 10= Demolished

7. Analysis • This data proves that our hypothesis is accurate, the four rotor egg had the slowest descent as well as taking the least damage. • Compared to the three and zero rotor eggs there is a substantial difference in the amount of damage taken and descent time.

8. Conclusion • We are comfortable accepting our hypothesis as true. • The experiment provided great results and worked flawlessly.

9. Thanks!  • Are there any questions?