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String Shooter Pipes....air driven

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Homemade Science with Bruce Yeany

String shooters have become a popular toy over the past few years. Since posting a video showing two spinning wheels spitting out a 16 foot loop of string, quite a bit of insights into the science behind it's behavior has been posted through a number of sources including published papers and a number of videos posted on YouTube. In this video, I'm demonstrating a far simpler method of launching a loop of string using a high speed air stream. Drinking straws launch strings using lung power for small versions while vacuum exhaust launches larger versions. While it's path may match that of the wheel propelled shooter, I think the explanation of it's launch may have additional complexity, or at least I don't have an understanding of them as yet. Questions such as what would be the best ratio of air speed to string speed? what happens to the string as the two speeds become closer? At what point does the loop break down into a chaos on the outgoing pathway? My Lab helper for today is named is Casey, she is 6 months old and constantly inquisitive

additional videos with explanations
International physicists tournament
   • IPT 2019 Semifinals: 13. String shoot...  
   • IPT 2019: 13. String shooter | France...  
Steve Mould
   • This String Shooter Is SO Weird  
Action lab
   • The Real Reason a String Launcher Works  

Published articles on string behavior
https://emergentscientist.edpopen.o...
https://www.sexyloops.co.uk/theboard/...

Original YouTube posting that started the string shooter craze
   • String shooterString launcher physi...  

commercially available string shooter Zipstring
https://zipstring.com

3D print version available on thing verse
https://www.thingiverse.com/thing:330...

posted by nerejatsto