35 votes

Antiballast for flying ship

Volume-based Adjustable Buoyancy The key here is to not use so many stones that your ships float up. Instead, use as many stones as is needed to make your ship effectively weightless. If 1kg of ...
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  • 5,052
30 votes

What is the best ways of cleaning/bathing inside an astronaut suit?

Rotate troops often enough and it's a non-issue. In a system of earthworks, the fire-trench where the action happens is only the outermost layer of a complex tiered system of trenches, bunkers, and ...
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  • 33.2k
27 votes

Antiballast for flying ship

Harvest extra ballast water from clouds. The Graf Zeppelin did this in real life during the 1930s. A set of gutters on the side of the vessel collected the water. The airship brushed against the edge ...
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  • 27.4k
15 votes

Antiballast for flying ship

Build a chain which incorporates some of the floating material. The resulting chain will be "weightless" and can therefore be of arbitrary length - instead of ultimately ripping under its ...
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  • 941
14 votes

Antiballast for flying ship

The stones are expensive, so you dont add so many that the ship becomes weightless. You essentially build a Heavier-Than-Air airship. It will naturally float down if nothing is done, but by the use of ...
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  • 40.3k
9 votes

Antiballast for flying ship

All matter has mass. The stones are in the mountain because when the mountain was molten, and the material comprising the stones was still there, they did not float away into space. There is a ...
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7 votes

What is the best ways of cleaning/bathing inside an astronaut suit?

Wear the suits for weeks and then burn them My Grandad fought in Burma in WWII. Hot, damp, full of things that bite and sting. I recall him saying they used to get smeared with anti fungals and pest ...
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6 votes

Could vacuum armour protect vehicles and people from explosions?

So, would this work? [...] I'm interested to know why this hasn't been tried. Making vacuum in an environment with largely uneven dimension is difficult, and your case looks exactly like this ...
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  • 245k
6 votes

Could vacuum armour protect vehicles and people from explosions?

No Just because there is a vacuum does not mean that the pressure wave would stop propagating. Instead, as the pressure wave hit the armor, the pressure differential would push the armor towards the ...
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  • 1,476
6 votes

Antiballast for flying ship

Heat the stones. Whatever handwavium takes place to make the stones generate antigravity is reduced when the stones are heated. The Handwavium returns as the stones cool. Bonus, that is why the stone ...
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  • 3,934
6 votes

Antiballast for flying ship

I'm surprised that nobody else has suggested this. Don't rely 100% on floatium for your buoyancy. Have a hot air balloon that takes your ship over the threshold. You don't need huge blimp-sized ...
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6 votes

What is the best ways of cleaning/bathing inside an astronaut suit?

I doubt that in the situation that you describe the war between troops is basically WWI style: if you get out of the trench, you die, if you stay too long in a trench, you're bombarded. And yes, they ...
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  • 245k
6 votes
Accepted

Relativistic Droplet Accelerator

TL;DR: don't think of this as a gun that fires bullets. Think of it as a neutral particle cannon that doesn't suffer from electrostatic blooming and has low rates of thermal blooming. It will act like ...
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6 votes

Relativistic Droplet Accelerator

It doesn't matter what type of particle it is, and the micro-droplets won't impact like bullets due to their small size. The article describes a droplet weighing 10^-16 grams. Even at 0.9c, this only ...
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  • 3,595
6 votes
Accepted

Possible deltaV savings by usage of Lagrange points in intra-solar transit

Absolutely. Your idea sounds very similar to the Interplanetary Transport Network. The general idea is that orbits around L1, L2, and L3 are unstable. Any trajectory leading into those points will ...
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5 votes

Possible deltaV savings by usage of Lagrange points in intra-solar transit

Orbital slingshots work because one of the bodies involved "steal" momentum from the other, similarly to what happens when ice skating and you push your friend, with you coming to an alt ...
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  • 245k
5 votes

Would would an undiscovered element show up as on a light spectrum analysis?

You can sometimes tell quite a lot from remote sensing and looking at the reflection from an object. It can be illuminated by your own laser like in LiDAR or reflected light from the sun. However, you ...
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  • 5,109
5 votes

Antiballast for flying ship

I guess we could use reaction of slaked lime with carbon dioxide. Ca(OH)2 + CO2 → CaCO3 + H2O But to get 1 kg of weight this way we would need to pass at least 3 ton of air through lime-water. Water ...
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  • 4,113
5 votes

Antiballast for flying ship

How about using guide ropes? They pretty much self-regulate to a great extent. https://en.wiktionary.org/wiki/guide_rope Make the whole thing a hot air balloon. Your magic stones will make it ...
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  • 4,834
5 votes

What is the best ways of cleaning/bathing inside an astronaut suit?

Hook up to the ethanol tank The suit and soldier in it is flushed with 80% ethanol. Residual ethanol evaporates into the air cycle within the suit and eventually is dealt with by the soldier's ...
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  • 284k
5 votes
Accepted

Could vacuum armour protect vehicles and people from explosions?

I am going to bring up some considerations that I have seen lacking or poorly explained so far. The long and short of this is that this armor is impractical in addition to not being viable. For ...
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  • 29.1k
4 votes
Accepted

What is the best ways of cleaning/bathing inside an astronaut suit?

Read about good trekking shoes and thier construction. Most of them have some kind of silver, copper or bronze lining for antibacterial, anti viruses and anti fungal purpouses. Smell comes from ...
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  • 773
4 votes

Antiballast for flying ship

Ordinary, unheated air. At jet cruising altitude, outside air is -40 C to -70 C = 203 to 233 K. Comfortable cabin air = 298 K. 218/298 = 73%. Air inside cabin weighs more than 1/4 less than outside ...
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  • 21.5k
3 votes

Would would an undiscovered element show up as on a light spectrum analysis?

Yes. This is one way to look for unusual types of matter. DETECTION OF AN UNIDENTIFIED EMISSION LINE IN THE STACKED X-RAY SPECTRUM OF GALAXY CLUSTERS The Astrophysical Journal, 789:13 (23pp), 2014 ...
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  • 284k
3 votes

What's the fastest a medieval projectile could go, if it was powered by human muscles?

Empirical evidence: the whip. The crack of the whip happens when the whip tip reaches the speed of sound in air (about 330-340 m/s depending on air temperature). Massaging the equations seems to ...
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  • 52.4k
3 votes

Could vacuum armour protect vehicles and people from explosions?

Let's have numbers! Air has mass. The tens of kilometres of air above us pressing down creates, by definition, an average pressure of 1 atmosphere at sea level. You don't notice this pressure ...
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  • 19.6k
3 votes

Antiballast for flying ship

Birds Dump some bird seed on the deck and play some territorial bird calls. Suddenly every bird in a kilometer radius has landed on your air ship and is weighing it down. You will have to be very ...
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  • 470
2 votes

Antiballast for flying ship

Reduce lift by using a tethered "balloon" to temporarily eliminate the lift of the stones. Simply throwing the stones overboard is not feasible due to their cost, but you can throw them ...
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1 vote

Antiballast for flying ship

This also seems to depend on how the floating 'mechanism' of the stones work. If for instance they work (similarly) like magnets, they are not floating but actually repelling the magnetic field of ...
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1 vote

The "Exciting" Drilling company dug an underground canal connecting Death Valley to the Pacific. How does it change the Mojave climate?

Let us make a comparision with Bahrain (The Kingdom of Bahrain consists of 34 Islands.) Bahrain Mojave Rainfall (average, per year) 2.79" 7" Snowfall 0" 1.1" Precipitation (...
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  • 5,413

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