wascilly_wabbit

wascilly_wabbit t1_j8yl4zg wrote

> Pico balloons are typically about 3 ft. in diameter on the ground before they are launched. As they ascend to altitudes of 20,000-50,000 ft., the super-pressure balloon envelope expands by about 2-3 times in size and achieves neutral buoyancy, allowing them to float at a roughly consistent altitude

https://aviationweek.com/defense-space/aircraft-propulsion/hobby-clubs-missing-balloon-feared-shot-down-usaf

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