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# Stupid physics presentation (final)

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### Stupid physics presentation (final)

1. 1. THE EFFECT OF ANGLE OF ATTACK ON THE LIFT FORCE CREATEDELIZA GOODING, AND LACHLAN HASSMAN St. Andrew’s Sewanee School Sewanee, TN Gooding & Hassman, SAS
2. 2. PROBLEM & HYPOTHESISProblem:Does the lift force created by anairfoil increase as the angle atwhich it faces the wind increases?Hypothesis: If the angle of attack isincreased, so too will the amount oflift it creates until it reaches a pointof stall. Gooding & Hassman, SAS
3. 3. INTRODUCTION This experiment explores the miracle of flight.Flight is allowed by the force of lift, which counteractsgravity and allows the aircraft to increase its altitude.Angle of attack is an angle of elevation at which theairfoil or wing faces the relative wind. Gooding & Hassman, SAS
4. 4. LIFT EQUATION Gooding & Hassman, SAS
5. 5. MATERIALS• 2 foam boards, 7”×36”×2.5”, with extra• 2 glass or acrylic pane 7”×30”• 1 desktop fan• Industrial trash bag• Duct tape• Rubber Cement• String• Airfoil• Metal Rods• Force Reader Gooding & Hassman, SAS
6. 6. METHODS1: Cut slits in the foam boards2: Place dots of rubber cementin the slits and fit the panesinto the slits.3: Place the desk fan next toone of the openings, and cutthe trash bag so that it fitsaround the opening of the fan. Gooding & Hassman, SAS
7. 7. METHODS (CONT.)4: Make Airfoil5: Attach a section ofstraw to either side of theairfoil with duct tape.6: Thread the metal rodsthrough to the bottom7: Thread string throughrods Gooding & Hassman, SAS
8. 8. METHODS (CONT.)8: Attach the string to the force reader.9: Use a protractor and level to draw increasingangle measurements from a level line.10: Measure the change in the force reader. Gooding & Hassman, SAS
9. 9. DATAGooding & Hassman, SAS
10. 10. ANGLE OF ATTACK VS. LIFT CREATED Gooding & Hassman, SAS
11. 11. Gooding & Hassman, SAS
12. 12. DATA ANALYSIS • Amount of lift created rose until it reaches a point of stall, and them cuts off completely. • Percent uncertainty decreases as more lift is created. Gooding & Hassman, SAS
13. 13. CONCLUSION• Our hypothesis is correct. We increased the angle of attack, and the amount of lift which was created increased until stall. This is shown and proven by the data table and the graphs. Gooding & Hassman, SAS
14. 14. BIBLIOGRAPHY• Benson, Tom . "Geometry Definitions."NASA. N.p., n.d. Web. 23 Jan. 2013.<http://www.grc.nasa.gov/WWW/k- 12/airplane/geom.html>.• Benson, Tom . "Modern Lift Equation." Re-Living the Wright Way -- NASA. N.p., n.d.Web. 27 Jan. 2013. <http://wright.nasa.gov/airplane/lifteq.htm• Benson, Tom. "Inclination Effects on Lift." NASA - Title.... N.p., n.d. Web. 27 Feb. 2013.<http://www.grc.nasa.gov/WWW/k- 12/airplane/incline.html>.• Bockinski, J. (n.d.). Which angle of attack generates the most lift. The Complete Handbook of Science Fair Projects, 41. Gooding & Hassman, SAS
15. 15. BIBLIOGRAPHY (CONT.)• Jakab, Peter. "The Wright Brothers | Designing the 1900 Wright Glider." The WrightBrothers. Smithsonian National Air and Space Museum, n.d. Web. 27 Jan. 2013.<http://airandspace.si.edu/wrightbrothers/fly/1900/ designing.cfm>.• Lawrence, Harry. Aviation and the role of government. Dubuque, Iowa: Kendall/HuntPub., 2004. Print.• Reyes, C. (2009). RCadvisors model airplane design made easy: the simple guide todesigning R/C model aircraft or build your own radio control flying model plane.Albuquerque, N. M.: RCadvisor.com..• Rosen, J. & Gothard, L. Q. Bernoullis equation. In Science online. Retrievedfromhttp://www.fofweb.com/activelink2.asp?It emID=WE40&SID=5&iPin=EPS0313&SingleRecord=True Gooding & Hassman, SAS
16. 16. ACKNOWLEDGEMENTSLuke Diamond for his support and insightSusan Core, For relationship adviceLachlan’s Grandfather Harry Lawrence, for hisinsightful explanation of terms and ideas, and for acopy of his textbook Aviation and the Role of theGovernment.Isabel Butler for her photography help and support Gooding & Hassman, SAS
17. 17. Gooding & Hassman, SAS
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