29 votes

FTL gates and drives used simultaneously without redundancy?

Planes, trains and automobiles The different forms of FTL travel are the same difference between walking, cycling, driving, and flying on an airplane. The later methods are more technologically ...
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  • 37k
23 votes

A better way to do a planetary invasion?

In terms of penetrating through air defenses, you aren't going to be able to do better than a reentry vehicle in the first place. It's easy to miss this, because there isn't much frame of reference up ...
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18 votes
Accepted

A better way to do a planetary invasion?

A planet is a complicated thing to attack, and I feel a lot of military science fiction vastly oversimplifies this. Detection on Approach Your incoming spacecraft are only visible out to about 7.2x ...
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14 votes

FTL gates and drives used simultaneously without redundancy?

Risk. Wormgates are in space and some weasels clear space next to them. Jump is 100% safe. Wormdrive is risky. You do not know that your travel will not end with a collision with an asteroid right ...
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  • 439
10 votes

How would time logically be measured on a massive starship in perpetual flight?

I assume all of these species(!) evolved on a planet. Their biology will be atuned to their planets' day-night cycles, so it will still make sense to have artificial cycles on the ship. (see Circadian ...
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  • 6,457
9 votes

Social status by fuel used?

This isn't quite what you described, but may be usable for your purposes. Hydrogen comes in three different isotopes -- H1 (protium), H2 (deuterium, also D), and H3 (tritium, also T). H1 and D are ...
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  • 794
9 votes

Safe Alcubierre drive

Not a Problem I do not understand the maths behind the Alison Cubert Warp Drive. But I am VERY good at reading Wikipedia articles. On a good day I can also read the Abstract and Summary of an ...
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  • 37k
8 votes

Could harvesting antimatter from a Gas giant's van Allen Belts be feasible?

Feasibility is in the eye of the beholder Recommended that you refer to the NASA paper (pg 31.) that looked at this topic in more detail than you are likely to find in other places. In short, expected ...
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  • 20.6k
7 votes

How to Sneak Von Neumann Probes Past the Enemy?

Mechanically accelerate the probes. A look into railgun physics and design Railguns, however, do not have these limitations. Since the force on the projectile is proportional to the current applied, ...
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  • 272k
6 votes

FTL gates and drives used simultaneously without redundancy?

You just described interplanetary and interstellar transports. The wormgates are awesome for ships without any drives. They take you to and from one planet to another, or even across interstellar ...
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  • 39.4k
6 votes

FTL gates and drives used simultaneously without redundancy?

The most obvious point here is... how do you use an FTL gate, if the only place you can put the destination gate is within sublight-attainable distances? Woohoo, 10 years to set up the Oort cloud gate!...
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  • 9,748
6 votes

A better way to do a planetary invasion?

Dropships would ordinarily fulfill a specific role just like paratroopers would. You want to be able to simply fly a plane or VTOL craft (or in this case a dropship) in and drop fully equipped people ...
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  • 39.4k
6 votes

How would Utility fog grey goo travel through space?

Q: Without their programming evolving intelligence to the level that they can build/form their own propulsion systems, how would they travel through space to the next location? They would not Without ...
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6 votes
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How to Sneak Von Neumann Probes Past the Enemy?

Antimatter Rocket and Magsail Breaking Space is huge. A probe is tiny. Use stealth materials for the probe. Let the exhaust go into a direction where there are no enemy observers. Slow down with a ...
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4 votes

Social status by fuel used?

I could write a long answer. But I could also point you to Atomic Rockets article on choosing your fusion fuel. Scroll down a bit and you will see a nice table explaining most common fusion reaction. ...
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4 votes

A better way to do a planetary invasion?

Your invasion is easy to hard counter with missile trucks. Even after aerial superiority is achieved, it's easy for a planet to hide a bunch of trucks with missiles under tarps, forests, caves, ...
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  • 23.5k
4 votes

A better way to do a planetary invasion?

If you want to conquer a planet, you don't invade it, you attack it. The best way to attack a planet is to show up and schedule a demonstration of your weapons, and then give the natives a chance to ...
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4 votes

FTL gates and drives used simultaneously without redundancy?

As I read the question, it's a bit hard to understand what you are asking. Assuming that you mean, How can I justify the existence of these three types of FTL without making any of them redundant/...
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  • 1,237
4 votes

FTL gates and drives used simultaneously without redundancy?

Largest difference is travel speed Worm gate (long distance): Can be much larger and have more power generation, wormhole stabilizers, wormhole creators, etc. Can connect to a much further distance ...
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4 votes

How would time logically be measured on a massive starship in perpetual flight?

Atomic clock? https://en.wikipedia.org/wiki/Atomic_clock An atomic clock is a clock that measures time by monitoring the frequency of radiation of atoms. It is based on atoms having different energy ...
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  • 272k
4 votes
Accepted

Safe Alcubierre drive

The warped space is supposed to create a flat region in the center, so any blue shifts going through the warped space should be nullified by complementary redshifts, I believe. However, there is still ...
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3 votes

FTL gates and drives used simultaneously without redundancy?

Wormgates/Wormdrives have a minimum practical range. So one would want to use Warp for insystem use, nobody wants to spend six months on the way to Mars when Alpha Centauri is just an eyeblink away. ...
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  • 97.1k
3 votes

FTL gates and drives used simultaneously without redundancy?

Energy usage To send smaller ships, the Energy needed can be easily provided by the ship's own power plant. But as the ship size increases, so does the power draw, but exponential. A ship twice the ...
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  • 11.8k
3 votes

FTL gates and drives used simultaneously without redundancy?

Lots of good answers here, but I can provide an overview with less text. Wormgates are easy. They require infrastructure. Think of this as your railroads: high infrastructure cost, limited access ...
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3 votes

How would Utility fog grey goo travel through space?

Two ideas: Forward thinking. This requires simple pre-programming to initiate: When they survey the planet's structure, they'll find the volcanic potential. Stripping the planet's atmosphere can be ...
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2 votes
Accepted

Reaching Proxima Centauri within 10 years of ship time in the year 2300

Proxima Centauri is approximately 4x1013 kilometres away from us (or 40 trillion, if you like). To cross it in 10 years (from the point of view of an outside observer) requires an average speed of ~0....
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2 votes

Social status by fuel used?

Neither normal helium nor normal hydrogen can be used as fusion fuel, so the whole plot is impossible. Fusion fuels are deuterium, tritium and helium-3 (ignoring proton-boron fusion). Deuterium is ...
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  • 1,218
2 votes

FTL gates and drives used simultaneously without redundancy?

Safety Other answers have touched on this but I thought it bore some further discussion: the main reason you still have warp drives at all is they they are a 100% safe means of travel. "Space ...
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  • 706
2 votes

FTL gates and drives used simultaneously without redundancy?

It all comes down to money - abstracted, in this case, as energy cost. A wormgate, while a permanent portal to another location, will transport anything any everything through it, like a regular door. ...
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  • 12.1k
2 votes

How to Sneak Von Neumann Probes Past the Enemy?

If nano tech is available(?). You covered pretty much all of the bases, so the only thing I can think of is, to deploy small swarms nanites into the systems Ort Cloud / Kuiper Belt. Each swarm is ...
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  • 1,237

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