4 ms·
I think bigger question is, how do you bring the blimp down without dumping out helium?
by whatsupdog 7mo ago
I think bigger question is, how do you bring the blimp down without dumping out helium?
- numpad0 7mo agoAirships have air bags inside. Same deals as submarines. They take in and out ambient stuff into the bags to control buoyancy.
- dotancohen 7mo agoWhat ambient stuff is available at the altitude where a zeppelin typically flies?
- Retr0id 7mo agothere is generally plenty of ambient air in the earth's atmosphere
- dotancohen 7mo agoAnd how can that ambient air be stuffed into bags to control buoyancy?
- Retr0id 7mo agohttps://en.wikipedia.org/wiki/Air_pump https://en.wikipedia.org/wiki/Air_pump
- dotancohen 7mo 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 7mo agoTell that to the airships I guess
- cenamus 7mo agoThe stuff the Zeppelin/Blimp floats in
- dotancohen 7mo agoAnd how do you propose that stuff be stuffed into the bags to control buoyancy?
- numpad0 7mo 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...
- 8note 7mo agoyou could compress the helium into tanks?
- estimator7292 7mo agoThis. Buoyancy is related to volume. Reduce the gas volume, increase its (relative) density, bouyancy goes down, ship goes down. Same way submarines adjust dive depth without dumping air overboard.
- ultratalk 7mo agoAttach hooks to the bottom of the blimp and send a guy in a heavy sled with hooks on it, with helium balloons attached to it, to the bottom of the blimp. Attach the sled to the hooks on the blimp, then get the guy to pop all the sled's balloons. The blimp will land on the ground gently, if the math is right.