user3482749
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Is there something wrong with my fictional lighthouse?
28 votes

Here is a nautical chart of a random bit of Scottish coast: You see all of those coloured arcs and circles? Every single one of those is a lighthouse or similar (there's also a bunch of smaller buoys ...

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Best place on Earth to fake being on a distant planet?
24 votes

Even if you stick to daytime to avoid the issues raised in the comments, there are still some things that would lead the astronauts to think they're on earth - the sun being the right colour/distance, ...

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Could a large enough fleet generate tsunamis while moving from a place to another?
10 votes

No number of ships would do this. Ships simply do not move quickly enough - the water will just move around them.

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How long could a late WW2-era battleship last under sustained ship of the line cannon fire?
9 votes

Taking just the energy side of the question: say we're using 36lb (17.6kg, we'll round up to 18kg) guns. These have a muzzle velocity of ~450m/s, apparently. That means that the kinetic energy in each ...

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Does the technology to create a laser weapon naturally provide defense from it?
6 votes

Using that same technology wouldn't defenders be able to refract any laser attack away using lenses, and/or dissipate the heat of the attack? Or is there some way that laser technology gives an ...

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How to design and build a fortified compound in a 12-hour daylight period?
Accepted answer
6 votes

The owlbats seem like the only real threat here (everything else is defeated by a circular wall raised by the earth mage and some sharpened sticks at the worst). However, predators do not generally ...

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Will this stealthy ship work?
5 votes

Apart from all of the other issues mentioned: any solar system developed enough for this to be a thing is likely a solar system that has mapped out all of its asteroids of this side, at which point ...

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Semi-FTL quantum communications
5 votes

The whole "moving the entangled particles around slowly" thing is a red herring - even if you can magically teleport your entangled particles, you still can't transmit information faster than the ...

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How many ships would an interstellar empire have in their navy?
3 votes

I'm going to assume that you have FTL. As pointed out in the comments, there's no such thing as an interstellar empire of any significant size without it. To avoid giving myself migranes, I'll assume ...

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Modern military equipment in a fantasy world
2 votes

We accept their request for help, but we don't go and help by marching armies around having pitched battles, because that's silly. Instead, we send through the parts to build a zeppelin, and a bunch ...

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A Sailing Ship With Cylindrical Sails
1 votes

If you're willing to allow a little flexibility, sort of. Make the sails as parachute foils, arranged as in a standard rectangular ram-air parachute, but with the edges extending down to the deck (to ...

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Most efficient and feasible non-rocket spacelaunch methods moving into the future?
1 votes

In increasing order of launch volumes required for viability: Things to assist the rocket launch process in some way. Things like balloons to get you past most of the atmosphere before you start with ...

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Assuming you had the ability to create a wormhole, could you control where it opened up the first time you "turned it on"?
1 votes

Realistically speaking? Probably you'd make both ends in the same place, then move them around. It doesn't matter at all, though (the answer is "whichever is most interesting to you") - there are ...

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Why do the rich want to live on the ground?
1 votes

For buildings: if they're tall enough, the upper floors will be a pain to get in/out of: the more floors you've got, the higher a percentage of the ground floor needs to be made of elevators to ...

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You have some cheat codes for real life, but they're expensive to use. Can they still be used?
0 votes

From a more pessimistic perspective: this would absolutely be used as a weapon. Deleting the enemy's aircraft carrier is more than worth the cost.

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How to prevent superluminal traveling idiots from wrecking half of the universe?
0 votes

Peace and Lack of Access Right now, we have access to technologies that could wipe out humanity, and yet we haven't. The reasons are twofold: there haven't been any major (direct) wars between nuclear ...

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Reasons for a Unitary Government to have Provinces?
0 votes

Some decisions just fundamentally are local, so you will have some form of local government, and this doesn't make you a confederacy at all - it's simply inefficient to, say, have planning permission ...

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How do you send out SOS in space if there is no absolute coordinate?
0 votes

Use the signal itself to communicate your relative location to the recipient: when they pick it up, they get the direction that you're in by default, and if you include some information about the ...

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