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Search: Posts Made By: das180
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Forum: Military Aviation
19th Feb 2023, 14:07
Replies: 291
Views: 109,923
Posted By das180

Another (whimsical) balloon destruction: ...

Another (whimsical) balloon destruction:

www.bbc.co.uk/news/world-us-canada-64695059
Forum: Military Aviation
19th Feb 2023, 13:31
Replies: 291
Views: 109,923
Posted By das180

Balloon tracking web sites: ...

Balloon tracking web sites:

amateur.sondehub.org

amsat-uk.org/beginners/balloons/
Forum: Military Aviation
13th Feb 2023, 15:01
Replies: 291
Views: 109,923
Posted By das180

Sadly it's a lot smaller at ground level.....

Sadly it's a lot smaller at ground level.....
Forum: Military Aviation
13th Feb 2023, 14:07
Replies: 291
Views: 109,923
Posted By das180

At 40 km the STP atmosphere density is 0.0038 kg...

At 40 km the STP atmosphere density is 0.0038 kg per cubic metre. The temperature is -30 deg C. So a car shaped box of air would weigh say 20 * 0.0038 = 60 grams - so the ballon can’t weigh more...
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