Science Olympiad Elevated Bridge 2009
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Uploaded by BalsaBridgeBuilder on Aug 7, 2009
To view efficiencies, download these photos, or find construction details for each bridge, click on the link:
http://gallery.scioly.org/categories.php?cat_id=52
Thanks for watching. Feel free to leave a comment if you have any questions.
Music: Perpetuum Mobile by Penguin Cafe Orchestra
Uploader Comments (BalsaBridgeBuilder)
All Comments (27)
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gay
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im doing towers this year, which density wood is good for the frame? how about for trusses?
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I'm trying to get the link, but it won't show in the info box. Could you post it as a reply?
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im in the B division too and my friend and i are doing the bridge and the regionals is tomorrow and one of our bridges held 52 pounds! sooo we did that design!! and were hoping that we will do good.
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I i am in the b division elevated bridge just to let you know
:p
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what size of balsa did you use? did you mix balsa and bass? what did the winner at nationals have? I am building a bridge for states right now its around 11 g and gotta test it out. Thanks
2xBlackBeltWTFandITF 1 year ago
@2xBlackBeltWTFandITF
Which bridge design are you referring to?
95% of the time, I used just balsa. There were some occasions where did want a little bit of bass though. For instance, my 1/16" square tension members were composed of bass.
The winner at nationals (C) used all balsa, I believe.
BalsaBridgeBuilder 1 year ago
@BalsaBridgeBuilder ok thanks it looked like a very good design. Did you test it out with bridge building programs first?
2xBlackBeltWTFandITF 1 year ago
@2xBlackBeltWTFandITF
The link in the information box has descriptions of all 42 bridges I built last year, including wood size and density information.
I did not try out any of these designs with a program. To test every design I thought of, I built an actual bridge and put it to the test in real life. It may seem inefficient, but obviously my results were quite nice. : )
BalsaBridgeBuilder 1 year ago
what type of ca did you use? thin medium thick?
curtiswernethere 2 years ago
Thin for butt joints and medium for lap joints.
BalsaBridgeBuilder 2 years ago