1. The Effect of Mass of Helicopter and Length of Hanging Mass from Helicopter on Acceleration Abby Bault – Center Line Megan Satawa – Warren Woods Tower

2. TABLE OF CONTENTS Conclusion Errors Made Real World Application Further Research Review Questions Background Problem & Hypothesis Materials & Procedures Data Collected Odd Trials/Data Statistical Tests

3. BACKGROUND Lift Thrust Drag Weight

4. LIFT Force that causes helicopter to move up Bernoulli Principle – Pressure increases as speed increases Wings – Air flows around body: changes pressure and velocity Through center of pressure

5. THRUST AND WEIGHT Thrust moves helicopter forward Must be equal to weight Weight is force of gravity – pulls down

6. DRAG Force that opposes motion Created by contact with fluid – Skin friction: interaction between solid and gas Acts through center of pressure

7. BACKGROUND

8. PROBLEM To determine the effect of mass of helicopter and distance of hanging mass from helicopter on the acceleration of the helicopter.

9. MASS

10. DISTANCE

11. HYPOTHESIS If the distance of the hanging mass from the helicopter and the mass of the helicopter are the greatest then the acceleration will be the slowest.

12. DESIGN OF EXPERIMENTAL VALUES

13. MATERIALS TI-nSpire Meter Stick Propel RC Toy Helicopter Craft String Propel RC Controller Different Masses Video Recorder Timing Device 18 AA Batteries

14. PROCEDURES Randomize trials and set up camera and meter sticks Fly the helicopter and record the flight Analyze the video using LoggerPro Record the acceleration

15. VIDEO

16. DATA COLLECTED

17. OBSERVATIONS Outline trials with specific observations HERE

18. ANALYSIS Two-Factor DOE – Mass and string length

19. STANDARDS

20. EFFECT OF MASS Mass (-) 25 g(+) 35 g 1.8761.424 1.3381.998 0.9811.597 Grand Average: 1.398Grand Average: 1.673

21. EFFECT OF DISTANCE Distance (-) 0 m(+).1 m 1.2692.03 1.7552.183 1.021.523 Grand Average: 1.348Grand Average: 1.912

22. INTERACTION EFFECT Mass (+) 35 g(-) 25 g Distance (+).1 m1.3112.035 (-) 0 m1.381.416

23. CONCLUSION Lack of statistical significant Based of D.O.E analysis Effect or InteractionEffect Value 2 x Range of Standards Greater than? Effect of Mass0.1389.138no Effect of Distance0.2829.138no Interaction Effect of Mass and Distance0.319.138no

24. CONCLUSION Scientifically significant results Based on dot plot of effects Mass Distance

25. CONCLUSION Hypothesis: Accepted

26. ERRORS MADE Wrong weight on helicopter for DOE 1 – Trials redone Lack of operating experience

27. Design Flaws Inconsistent helicopter battery power

28. FURTHER RESEARCH Different types of helicopters Different factors – Humidity, air flow(turbulent or laminar) jkda

29. real world application MedEvac Flights Emergency Rescue

30. QUESTIONS?