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Questions tagged [relativistic-rocket]

Questions regarding spacecraft with a velocity some significant fraction of *c*. (The speed of light)

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Relationship between propellant mass and thrust at relativistic speeds

When answering this question about relativity and delta-V I realized I don't know the relationship between the mass of propellants and how much delta-v they would produce in an engine at relativistic ...
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Backwards time dilation paradox [closed]

We have a pair of atomic clocks. Let's call them clock A and clock B. We switch both of them on at the same time. Clock A will stay on Earth and clock B will go with the astronauts. Astronauts with ...
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continuous acceleration in space

If you had a rocket with unlimited fuel and it was continuously firing, would the rocket keep accelerating to a faster and faster speed, or is there a speed limit where acceleration stops
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1answer
190 views

A laser can propel a spacecraft to 20% of light speed, time shorter on spacecraft?

So I recently learned about a project about using lasers on Earth to propel a spacecraft to 20% of light speed for interstellar traveling. So this brings an interesting question, how much shorter ...
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432 views

“Oh-my-god” particle drive performance

One of theories behind the origin of the esoteric oh-my-god particle was that it's exhaust of an alien spaceship. There are other explanations, some quite plausible, but let us for the purpose of this ...
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833 views

Is there a maximum ISp?

With ISp defined as ${v_e}\over{g_0}$, the naive approach would tell me, the maximum possible specific impulse, with propellant moving at speed of light relative to the craft, is $c\over{g_0}$ or 30,...