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2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

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4461700 No.4461700 [Reply] [Original]

If you were to have a blimp "filled" with vacuum, would it be lighter than air and thus float?

>> No.4461702
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4461702

yes. but it wouldn't have much more upward force than one filled with helium

>> No.4461706

>>4461702
*assuming the mass of the rest of the ship is less than the mass of air it displaces

>> No.4461708

>>4461702
This, with the added bonus that you'd need one gorillion kg of steel beams to prevent it to implode on itself

>> No.4461711

>>4461702
mfw that pic

>> No.4461712

>>4461708
i don't know, seems like a problem that engineers and material specialists would be able to solve.

>>4461702
Wouldn't it be lighter than one filled with hydrogen too?

>> No.4461719

>>4461712
yes, but all else being equal, it's the difference from the density of air that makes a difference. and helium, hydrogen and vacuum are only slightly different from each other, but all very different from air

25, 27 and 29 are the rough ratios of how effective the three are

>> No.4461736

What would be the probably effects if such a vehicle were to have a containment failure and implode?

>> No.4461740

>>4461736
depends if it was made of lava or ice

>> No.4461750

(you can't fill something with a vacuum)

>> No.4461756

>>4461712
>i don't know, seems like a problem that engineers and material specialists would be able to solve.

They have. They keep the balloon from imploding by filling it with hydrogen or helium.

>> No.4461771

>>4461750

That's why he put fill in quotations, you dumb shit.

>> No.4461774
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4461774

>>4461771

>> No.4461776

>>4461756

the best thing to fill it with is really hot hydrogen plasma

>> No.4461781

>>4461756
helium is expensive and in finite quantity and hydrogen has that nasty habit exploding.

>> No.4461783

wouldn't pressure difference fuck it up?

>> No.4461873

in theory yes a vacuum displacing air your have less mass than the air it was displacing and create buoyancy. But the the container needed to contain the buoyancy would need the structural integrity to withstand the weight on the atmosphere from imploding on the vacuum. That kind of container would weight more than the Buoyancy of the vacuum could lift. Not to say making a container that light and strong is impossible in the future, Its just impossible with out current understanding of composite materials and engineering

>> No.4461880

>>4461873
apologies for my typos.. am very tired.
Ironically enough it because i have spent the last 2 hour reading about the mechanics and history of airships.

>> No.4461899

>>4461880
that's not irony, that's serendipity

>> No.4461916

>>4461899
thank you, I will try to remember that.

for the record.. airships once you get past the glamor of massive lighter than air craft, are really really boring

>> No.4461933

What the fuck are you guys talking about. The vacuum in my house is has to be at least 10 - 15lbs. If a blimp was filled with them it wouldn't even be able to move. Holy shit is this supposed to be the "smartest" board? seems like a bunch of fucking retards in here.

>> No.4461950

>>4461933
9/10

>> No.4461986

>>4461702
>yes. but it wouldn't have much more upward force than one filled with helium

<Shakes head, sadly>
Of course it would.

>> No.4461991

>>4461933
I laughed.

>> No.4462004

>>4461700
Yes. It'd be extremely tough to construct though, given it would have to be as dense as air on the whole. You could only have a few kilos of weight for every metre squared of craft.

>> No.4462017

>>4462004
Try cubic.

>> No.4462019

>>4462017
This guy.