4 ms·
Airships have air bags inside. Same deals as submarines. They take in and out ambient stuff into the bags to control buoyancy.
by numpad0 8mo ago
Airships have air bags inside. Same deals as submarines. They take in and out ambient stuff into the bags to control buoyancy.
- dotancohen 8mo agoWhat ambient stuff is available at the altitude where a zeppelin typically flies?
- Retr0id 8mo agothere is generally plenty of ambient air in the earth's atmosphere
- dotancohen 8mo agoAnd how can that ambient air be stuffed into bags to control buoyancy?
- Retr0id 8mo agohttps://en.wikipedia.org/wiki/Air_pump https://en.wikipedia.org/wiki/Air_pump
- dotancohen 8mo agoAn air pump will not compress the air such that it becomes dense enough to overcome the buoyancy of the helium. The idea is ridiculous.
- Retr0id 8mo agoTell that to the airships I guess
- cenamus 8mo agoThe stuff the Zeppelin/Blimp floats in
- dotancohen 8mo agoAnd how do you propose that stuff be stuffed into the bags to control buoyancy?
- numpad0 8mo agoso balloons appear to have negative mass, it's actually just the result of having lower density than the air. the upward force balances out with the gravity where the lbs/in^3 figure of its entirety matches that of ambient air. it's exactly the same as how an empty tank underwater floats, and a water filled tank underwater sinks. or I guess one could say it's the bottom side getting more compressive load from air than the topside, given the observable effect, whatever floats our zep...