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projects:splat [2020/11/18 10:24]
rocketboy [Super Pressure Musings]
projects:splat [2021/04/07 10:21]
rocketboy [Test Balloons]
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 ==== Test Balloons ==== ==== Test Balloons ====
  
-The 36โ€ Qualatex balloons to be used have a mass of 37g and have a measured volume of approx. 0.10 (measured by helium lift) to 0.11cu m (measured by water fill) when nicely "​full"​. ​ Two balloons have been pressure tested - the first with a manometer the second with a pressure sensor MPX5010. ​ The results were burst at about 4.7Kpa (0.7PSI) and 5.4Kpa (0.8PSI) respectively. ​+The 36โ€ Qualatex balloons to be used have a mass of 37g and have a measured volume of approx. 0.10 (measured by helium lift) to 0.11cu m (measured by water fill) when nicely "​full" ​(i.e. not stretched).  Two balloons have been pressure tested - the first with a manometer the second with a pressure sensor MPX5010. ​ The results were burst at about 4.7Kpa (0.7PSI) and 5.4Kpa (0.8PSI) respectively. ​
  
 [[http://​www.youtube.com/​watch?​v=hr6x3r8phvE]] [[http://​www.youtube.com/​watch?​v=hr6x3r8phvE]]
  
-Testing suggests volume increases by about 33% at burst (due to stretch). Both tests resulted in a diagonal rips - see pictures.+Testing suggests volume increases by about 33% - 50% at burst (due to stretch). Both tests resulted in a diagonal rips - see pictures.
  
 {{:​projects:​balloonburst.jpg|}}{{:​projects:​2ndburst.jpg?​406|}} {{:​projects:​balloonburst.jpg|}}{{:​projects:​2ndburst.jpg?​406|}}
projects/splat.txt ยท Last modified: 2021/04/07 10:23 by rocketboy