We weighed the flight box with all final stuff in it, and it has come is quite light at 1125g or 2 lb 8 oz. This is great because we can achieve higher altitude. We re-ran the burst calculations and, sure enough, the balloon will rise much faster (4.33 m/s) at this lighter weight. 2 hours to burst at 100,00 feet. Neck lift of 1927 grams will be used to set a lift mass that we will use to make sure we have the right amount of helium. At the lighter mass, the payload will drop more slowly on our Rocketman 4 foot chute, around 13 ft/sec or 3.9 m/sec. With the new faster ascent, and slower descent, we ran the predictor for 9am Sunday morning and it looks like we will launch near Hillsdale MI and enjoy a 3 hour flight!!!
3 Comments
Grandma C
7/9/2016 06:52:32 am
You are absolutely amazing!!! I don't know how you think of all this stuff. I will pray for you on Sunday.
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7/12/2016 03:56:31 pm
Awesome work! Looking forward to seeing the results of your launch!
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Kim Laird
7/15/2016 10:06:34 am
I wonder if another balloon would be a good backup and ensure faster rise. Fascinating experiment. Question for you two, did you have to get a permit to do this experiment, since it goes through flight space (I assume)
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AuthorMalachi and Ezra's page where we build cool stuff and either break it, set fire to it, etc. in the name of science. Archives
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