Questions tagged [spaceships]

For questions involving implemented theory or technology for travelling through space. Consider also [space-travel]. See also the tag information (click "info") for more details on when this tag applies.

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21
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11answers
2k views

Can realistic planetary invasion have any meaningful strategy?

The sea is used as an analogy in space travel, and sometimes it works well. Ships sail on long journeys, between distant lands, across a hostile medium. But these analogies tend to break down when it ...
1
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1answer
58 views

How fast do we spin this for 'One g'

Following on from this question. Question Context : Mars second moon Deimos has been converted into a generation ship. A considerable portion of its mass has been shaved off during the process &...
2
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1answer
58 views

How many people can a sealed 3x1x1 km biome support?

Question Context : Mars second moon Deimos has been converted into a generation ship. A considerable portion of its mass has been shaved off during the process & ejected backwards along its path ...
1
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3answers
89 views

Why does FTL travel require a human who can survive in space? [closed]

Imagine ftl space travel that requires modifications to the human body enabling them to survive in space without a spacesuit, possibly even truly skyclad. What mechanism for ftl travel might require ...
2
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6answers
139 views

Two Structures Adrift In Space

There are 2 planet sized structures that are artificially made with no means of propulsion. Each structure has the approximate mass of Earth but are hollow inside. The inside area is where the people ...
4
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2answers
112 views

Long range laser using wormholes

So, I was recently watching Stargate: Atlantis, and I saw a very interesting concept. In one episode, the villainous Replicators use the stargate network to fire what is essentially a high-powered ...
6
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5answers
3k views

How to resolve the transporter conundrum in a FTL spaceship?

Imagine a spaceship capable of achieving faster than light travel uses several transporters to allow crew members to move around its interior at the constant speed of light. What happens to the crew ...
4
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7answers
2k views

Why don't military spaceships use blockchain technology for ship log? [closed]

Straight to the point, cut out the backstory: If blockchain is so secure and difficult to hack why don't the military spaceship use it for logging important and also non essential events, navigation, ...
31
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15answers
10k views

Starships without computers?

Say I've got a sci-fi setting where I have one faction using relatively advanced technology (think The Expanse, or pre-Covenant war UNSC from Halo, fusion rockets and high-yield magnetic accelerator ...
19
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20answers
4k views

Simple non destructive spaceship liftoff engine

I like to have a concept of an engine that spaceships can use to lift off (and land) from/on a planet (regardless of it having an atmosphere or not) with the following constraints: It should be ...
8
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10answers
1k views

Protecting Space Ships

I need a scientifically sound invention (or group of inventions) that ensures that battles fought in space will not just turn into a battle between systems that launch missiles and systems that ...
4
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4answers
148 views

Properties of a new engine

In my story, I need a spaceplane, that is, a shuttle which can fly in an atmosphere as well as in space. It needs to be able to land from space, and then take off and go to space without refuelling on ...
11
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6answers
2k views

How to create 'visible' space-laser-like weapons

Goal: Just imaging a Star Wars X-Wing fight, and you've got the idea. However, I want to know whether something like that is possible without tons of metaphysical hand-waiving and 'just because'. ...
7
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5answers
220 views

Capital ship reactor power

I'm trying to not delve too into the sciences so as to keep things fairly suitable for a space opera setting, but I'm trying to figure a few things to a reasonable degree of detail. My question here ...
7
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9answers
539 views

What are the Limits of Laser Weapons in Space?

In my eternal quest to model a decently-realistic sci-fi space combat system, I've run through the limitations of particle weapons, magnetic accelerator cannons, and fusion rockets. Now it's time to ...
6
votes
2answers
195 views

Flash-heating spaceships

I'm working on a version of wormhole-based FTL travel, and one of the side effects of passing through the wormhole is going to be instantaneous heating of every molecule of the thing passing through. ...
4
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1answer
156 views

Avoiding Space Debris [duplicate]

It occurred to me the other day that when a spaceship is travelling at near relativistic speeds, encountering a tiny rock could rip it apart. What could be done to protect from such incidents ...
4
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5answers
1k views

What's a safer design for a relativistic kill vehicle?

A large railgun mounted on the spine of a mega-scale starship (20-32km) or an antimatter-powered missile launched outside the ship? For clarification's sake, when I say "safer" I'm referring to "safer ...
32
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11answers
11k views

How do spaceship-mounted railguns not destroy the ships firing them?

And I'm not talking about the wimpy 32 MJ kind we have in the real world, I'm talking about the superweapon kind. Anyone familiar with Knights of Sidonia and their flagship's Heavy Mass Cannons will ...
6
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3answers
195 views

Nuclear Cannon: Viable Alternative to Coil / Railguns?

In one of my previous questions, I asked about the viability of creating a coilgun for use on a sci-fi warship which would be capable of accelerating a 1000kg projectile to a velocity of 30 km/s or ...
5
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3answers
238 views

Ring-Shaped Particle Cannons and Circular Coilguns

In my previous question a guy called Thorne pointed out that I could make a high-velocity coilgun without using a barrel of enormous length by taking a page out of the LHC's book and using a circular ...
10
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6answers
301 views

Why didn't many people see this spaceship?

An alien spaceship opened a wormhole to a location in near-Earth orbit just long enough for a ship to come through. The ship intended to make public, peaceful contact with Earth upon arrival, but ...
5
votes
3answers
169 views

How to protect oneself against strong magnetic fields?

Spacecraft in my Scifi setting use strong magnetic fields for many purposes. Fusion containment, magnetic nozzles, gauss guns, magnetic fields as pusher-plates for nuclear pulsed propulsion and ...
1
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4answers
188 views

What type of planet where non-aerodynamic space launch vehicles are possible

What would be the approximate gravity, atmosphere etc. of a planet for a species to never make or use launch vehicles with rounded shapes like tapering cylinders, because they make use of the ...
3
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2answers
252 views

Can midcourse flip pose danger at relativistic speeds?

Consider an interstellar spaceship. It is a rather classical design, somewhat similar to the ISS Venture Star from Avatar: http://james-camerons-avatar.wikia.com/wiki/...
8
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2answers
234 views

Solving the biggest problem of relativistic interstellar spacecrafts

In FTL-free universes, interstellar travel is often done by vessels capable of continuous acceleration (the drives themselves are often magitech), which can use the effects of relativistic time ...
7
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3answers
250 views

1g Acceleration Spaceship Design

In my story, a ship is built in orbit around Earth, designed for a 20-person scientific expedition to a planet 11.4 ly away. It will accelerate at 1g for half the distance, then flip around and ...
16
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15answers
7k views

Dodging a Deathbeam travelling at speed of light

There are 2 ships in space about 1 AU1 apart. Ship A fires a deathbeam on Ship B. The deathbeam travels at speed of light with no acceleration (or deceleration) at all and is guaranteed to hit its ...
2
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4answers
342 views

What kind of faster-than-light travel is this and is it at least plausible?

I've had a fairly complex world built up in my head for several years and finally writing a story in it. One thing I'm struggling with is explaining the galaxy's faster-than-light traveling. It's not ...
1
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3answers
394 views

Could near light speed ship dilate time severely enough to explore other stars with out breaking the light speed barrier?

At a constant 1G acceleration it takes a little less than a year to reach near light speed speeds. Time would dilate locally on the ship slowing time for them. Could the time dilation be pushed to ...
40
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19answers
10k views

Why would space fleets be aligned?

Recently I noticed how space fleets are all constructed so the ships are all aligned. With 'aligned' I mean the way how all ships seem to have a 'right way up' and that all the ships have the same ...
6
votes
5answers
248 views

Are laser-stars the better missile carriers in space warfare?

Laser-stars are war-spacecraft optimized to accommodate a huge laser weapon capable of eliminating an enemy thousands of kilometers away. They will usually have enormous radiators to deal with the ...
5
votes
3answers
839 views

How would the bridge command structure of a starship work?

In television and movies we have a very familiar bridge command structure: the captain gives orders like "shields up", "fire primary weapons", or "transfer power to sublight". I think this trope was ...
13
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9answers
2k views

Most optimal hallways with random gravity inside?

Lets say you have a space ship. This ship will do a lot of maneuvers causing a lot of G forces to go in different directions through the ship. During straight acceleration it pushes the people inside ...
4
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3answers
153 views

Realistically, what type of weapon is the best at delivering a specific radiation in space battle?

It's 20 years into the future, and humanity is (trying to) reaching for the stars. And congratulation, we have met a lot of quirky alien civilization, as per SF tradition. Unfortunately, this isn't ...
31
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6answers
4k views

What could possibly power an Alcubierre drive?

I understand that in order to compress and expand spacetime, an Alcubierre drive would require some sort of "exotic matter" with a negative energy density. Is that sort of exotic matter purely ...
8
votes
4answers
244 views

How best to use wormholes for spaceflight?

The goal is to get from Earth to the Outer Solar System, preferably the Kuiper Belt, as quickly as practical, with a crew of about 12, and a not-set-in-stone dry mass around 30 tons. The characters ...
10
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17answers
2k views

Making physical gunners preferred in space combat

Backstory: Space travel is commonplace and cheap -- space combat isn't uncommon either, whether it be two space fleets sallying forth into battle or a mercenaries defending a merchant ship from a ...
3
votes
3answers
119 views

Launching a spaceship with a portal-based engine?

I previously asked how best to use wormholes for spaceflight, focusing mainly on propulsion in space. I'm now wondering if there's a good way to get off Earth with this ship. The ship needs to be ...
5
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8answers
1k views

What formations would stellar capital ships use?

The science fiction militaries of my latest project field large numbers of space faring battleship style capital ships. Historical, combat formations have been dictated by the capabilities of the ...
14
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15answers
6k views

Deep Space bomber - Best bomb against Interstellar warship that is kilometers long in size

We have two opposing forces: the Democrats and the Imperialists. Each one can field an armada of ships numbering millions in their fleets, supported by trillions- to a quadrillion person strong super ...
6
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4answers
507 views

Time dilation difference of two spacecraft at different relativistic speeds, if the faster one circles back

I have the tables explaining time dilation for a single ship at different relativistic speeds, but am unsure how to modify that to work out for two ships at different velocities, and the two different ...
11
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9answers
2k views

Historical experience as a guide to warship design?

I've been working on designs for some model starships, in particular warships. My working assumption has been that the designs and materials for these ships will reflect the way that the civilisation ...
23
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14answers
3k views

On the feasibility of space battleships

We all know and presumably love enormous space battles with vast battleships doing minimal damage to each other for hours before being blown up by a single fighter. On Earth battleships became big ...
-3
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1answer
91 views

What happen if a giant cargo ship full of nuclear weapons crash-landed? [closed]

This is a big boi cargo ship we're talking about, the kind so large that it can't "blast off" - it has to be built in space and stay there. It is definitely not death-star sized. Let's say it's as big ...
18
votes
4answers
875 views

movement of space animals

Animals on planets are so 20th century - let's herd us some space animals! In this story I have the need to move a herd of pesky space animals. They like Suns for their juicy solar energy and ...
7
votes
10answers
567 views

Military Implications of Instantaneous FTL?

In an example future world, one can use some form of FTL to instantaneously transport any ship from one point to another point (within the same galaxy, to keep things simple). The device required to ...
8
votes
4answers
968 views

Can a Scaled-Up Whipple Shield Protect from Hypervelocity Rounds?

Specific situation question: I have a ship with a 'whipple' shield consisting of 5cm of titanium (or a material similar to it) spaced about 50 meters away from the main hull (which is itself pretty ...
15
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8answers
4k views

What kind of footwear is suitable for walking in micro gravity environment?

Set in the near future, the interior of the spaceship is coated with thin layers of Teflon approximately 10mm average thickness on top of titanium alloy which in case you are wondering it is weakly ...
9
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3answers
2k views

Destroying Hypervelocity Rounds With More Hypervelocity Rounds

In a previous question, I asked about using a scaled-up whipple shield to protect against a 250kg tungsten round traveling at about 60 km/s. The round in question is 'about' 10 cm in diameter and '...