elasclaunchglider’ - science olympiad...construcgon!rules! • maximum!wingspan!o!28!cm! •...

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Elas%c Launch Glider Science Olympiad 2014 Dan Olah [email protected]

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Page 1: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

Elas%c  Launch  Glider    

Science  Olympiad  2014  Dan  Olah  

[email protected]    

Page 2: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

Ballast  

Fuselage   Horizontal  Stabilizer/Stab  Wing  

Launch    Hook  

VerGcal  Stabilizer  Fin  Rudder  

Page 3: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

Chord  

Span  

Page 4: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

 

• Two  Major  Components  – Glider  design  – Flight  Log  (test  records)      

Page 5: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

ConstrucGon  Rules  

•  Maximum  Wingspan  -­‐  28  cm  •  Glider  weight  3.0  to  10.0  grams  •  Only  wood,  foam,  paper,  plasGc  film,  carbon  fiber,  tape,  thread  and  glue  and  non-­‐metallic  ballast  allowed  

•  Nose  cannot  fit  inside  lip  balm  cap  •  Launched  with  a  non-­‐metallic,  elasGc  band  •  Label  each  glider  with  team  name  and  no.  

Page 6: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

Flight  Log  •  Minimum  of  10  entries  (record  even  bad  tests)  •  Minimum  of  4  data  points,  more  may  be  useful  –  Peak  height  –  Length  of  launch  loop  –  Flight  Time  – Any  one  other  

•  10%  deducGon  for  incomplete  log,  30%  for  none  •  Most  important  part  of  pracGce  and  compeGGon!  •  Change  only  one  parameter  at  a  Gme  and  record  if  result  was  be\er  or  worse,  then  go  on  to  next  

Page 7: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

ConstrucGon  -­‐  General  

•  AnGcipate  building  more  than  one  glider  throughout  the  project  

•  PrioriGes  – 1  Build  quality/trueness/straightness  – 2  Strength  – 3    Light  weight  – 4    Various  designs    

Page 8: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

ConstrucGon  -­‐  Details  

•  Use  jigs  and  fixtures  to  keep  wings  and  tail  straight  while  gluing  

•  use  minimum  of  glue  •  Check  balance  to  center  of  gravity  by  moving  wing  back  and  forth  before  gluing  in  place  

•  Check  first  flights  by  hand  launch  without  elasGc  launch  

Page 9: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

Building  Jigs  

Page 10: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

TesGng  -­‐  Basics  •  Trim  for  lowest  sink  rate  •  Stall  –  Wave  pa\ern  on  descent:  add  ballast  to  nose  or  bend  stab  trailing  edge  down  

•  Dive  –  Goes  down  too  fast:  add  ballast  to  tail  or  bend  stab  trailing  edge  up  

•  Adjust  only  one  parameter  at  a  test,  ballast  or  bend  

•  Ader  balanced,  adjust  rudder  to  turn  glider  inside  the  room:  bend  rudder  trailing  edge  to  right  or  add  small  ballast  to  right  wing  Gp  for  right  circle  

•  Start  elasGc  launch  tests  and  repeat  above  cures    

Page 11: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

Glider  “Secrets”  

•  Set  glide  speed  just  faster  than  start  of  stall  •  Set  climb  angle  to  get  maximum  height  and  smooth  transiGon  to  glide  

•  ElasGc  power  depends  on  height  of  ceiling,  wider  band  or  longer  stretch  for  higher  ceiling  

Page 12: ElascLaunchGlider’ - Science Olympiad...ConstrucGon!Rules! • Maximum!Wingspan!O!28!cm! • Glider!weight3.0!to!10.0!grams! • Only!wood,!foam,!paper,!plasGc!film,!carbon! fiber,!tape,!thread!and!glue

Links  •  LOTS  of  informaGon:  legacy.amaglider.com  •  Forums:  www.scioly.org    •  Bulk  Balsa:  www.naGonalbalsa.com,  www.specializedbalsa.com,  www.balsausa.com  

•  www.a2zcorp.us/store  •  www.freedomflightmodels.com  •  www.amaglider.com/staGc/sciolympia/cmarkflight-­‐glider-­‐ad-­‐2014.pdf