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Tennessee Science Olympiad 2014

Tennessee Science Olympiad 2014. Elastic Launched Glider (Division C). Science Olympiad Coaches Workshop University of Tennessee October 12 , 2013 Betsy White (bwhite6@utk.edu). Terminology. Roll - rotation about the long axis Yaw - rotation about the vertical axis

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Tennessee Science Olympiad 2014

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  1. Tennessee Science Olympiad 2014 Elastic Launched Glider (Division C) Science Olympiad Coaches Workshop University of Tennessee October 12, 2013 Betsy White (bwhite6@utk.edu)

  2. Terminology Roll- rotation about the long axis Yaw- rotation about the vertical axis Pitch- rotation about the axis through the wings Incidence (angle)- angle of wing above long axis Fuselage or “fuse”- main body Ailerons- hinged flaps on wings that control roll Horizontal stab(ilizer)or elevator- horizontal part of tail Vertical stab(ilizer) or rudder- vertical part of tail Elastic Launched Glider 2014

  3. Glider Design Not legal • Must be able to withstand force of launch • Lightweight and aerodynamic • Different grains of balsa • A-grain: soft, malleable • B-grain: mid-range • C-grain: harder, more stiff • Blunt nose • Ambroidcement or CA/superglue (easily softened with acetone) • Key element: incidence (0-0) Elastic Launched Glider 2014

  4. Launch 1. Hold the launcher in one hand and glider attached to the elastic loop in the other. 2. Stretch the elastic the desired amount, and hold the system vertically. 3. Slightly offset glider horizontally away from launch handle (less likely to hit it) 4. Tilt the system 10-20° from vertical (for easier transition into its glide) 5. Roll the glider (rotate it about long axis) about 45° for corkscrew ascent 6. Launch and pray. Stick launchers allow for wrapping to adjust band length PRACTICE! Find a grip/launch technique that works Elastic Launched Glider 2014

  5. Rules/Specifications • Wood, foam, carbon fiber, glue, paper, plastic film, tape • Non-metal ballast (i.e. clay) • Must weigh more than 3.0g but less than 10 g • Kits are ok, no components w/ pre-glued joints or pre-covered surfaces • Wingspan not to exceed 30cm 28cm • Blunt nose (chapstick cap test) • Launch handle less than 1m long (excluding elastic) • Elastic: non-metallic, remain in contact w/ glider during launch • Labeled with team name • Flight logs • Eye protection at all times in the competition area Elastic Launched Glider 2014

  6. Flight logs Four parameters for at least 10 flights prior to competition • Required data parameters for each flight: • Estimated/recorded peak flight height • Approximate length of elastic loop (relaxed) • Flight time • Some suggested parameters are: (pick 1 or add your own) • Orbit diameter • Launch angle • Cross section of elastic loop • Height at transition to glide pattern Elastic Launched Glider 2014

  7. Competition BONUS: State and National Level 30% bonus on time aloft if in canard configuration Penalties • SixFive minute flight period • 5 official flights using 1 or 2 gliders or launch handles • Must declare as “official” before launch • Start time: glider leaves launch handle • Stop time: any part of glider touches floor/obstruction • No extra time for repair/recovery • Base score: sum of two three longest flights • Tie-breaker: longest non-scored flight • Must be launched from launch handle by a single competitor, floor level Elastic Launched Glider 2014

  8. Materials/Resources • Science Olympiad Student Center • http://scioly.org/wiki/index.php/Elastic_Launched_Glider • Freedom Flight Models • http://www.freedomflightmodels.com • YouTube: Science Olympiad - Elastic Launch Glider 2 • http://www.youtube.com/watch?v=Mp5YCny0r44 Elastic Launched Glider 2014

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