ideas:super-pressure_balloon_skin_tension_calculations
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| ideas:super-pressure_balloon_skin_tension_calculations [2018/06/14 21:55] – rocketboy | ideas:super-pressure_balloon_skin_tension_calculations [2018/06/21 12:38] (current) – rocketboy | ||
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| So floating at 25,000m the balloon must displace 13.327kg of air – since the local air density is 0.03995 kg/m^3 the balloon will be displacing 333.6 m^3 of air. | So floating at 25,000m the balloon must displace 13.327kg of air – since the local air density is 0.03995 kg/m^3 the balloon will be displacing 333.6 m^3 of air. | ||
| - | Assume a sphere shape for the balloon balloon - volume V = (4/3) . Pi . R^3 | + | Assume a sphere shape for the balloon balloon - volume V = (4/3) . Pi() . r^3 |
| which gives an r of 4.3m – diameter 8.6m | which gives an r of 4.3m – diameter 8.6m | ||
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| 701.1N/m = 71.5kgf/m = 48lb/ | 701.1N/m = 71.5kgf/m = 48lb/ | ||
| + | |||
| + | This spreadsheet allows you to calculate the surface tension for a non-eleastic constraining envelope: | ||
| + | {{: | ||
ideas/super-pressure_balloon_skin_tension_calculations.1529013354.txt.gz · Last modified: 2018/06/14 21:55 by rocketboy