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Search: Posts Made By: das180
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Forum: Military Aviation
23rd Apr 2023, 15:56
Replies: 141
Views: 26,413
Posted By das180

(Sorry, needed 8 posts to be allowed to post...

(Sorry, needed 8 posts to be allowed to post URLs):

https://www.davesinclair.org/prose/vne
Forum: Military Aviation
13th Feb 2023, 14:07
Replies: 291
Views: 110,038
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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