7 Earth-Size Planets Found by NASA

[Speaker to Animals]

Since weight is no limitation, an Orion craft can be extremely robust. An unmanned craft could tolerate very large accelerations, perhaps 100 g. A human-crewed Orion, however, must use some sort of damping system behind the pusher plate to smooth the instantaneous acceleration to a level that humans can comfortably withstand – typically about 2 to 4 g.

https://en.wikipedia.org/wiki/Project_O ... ropulsion)

100 g would turn you into a puddle.


Though, I think the EM drive looks like a better option at this point. We just don't know yet how it scales up.

[Smitty-48]

WHAT?

Acceleration of any kind literally is relativistic.

You need to go take a physics course in a university, man. You don't know what you are talking about here.

You could theoretically get to this star system in about 7-8 years with a ship built on 1960s technology. 40 plus years would pass on Earth, but not for you onboard that ship. I can't help that you don't understand the math.

Your biggest problem with an Orion drive is dampening the acceleration. You want to slow it way down. Getting to 1 g is not a problem at all.

There is no significant relativistic time dilation until you exceed 90% of the speed of light, at velocities less than that, the relativistic effects are far, far less, so for example;

At 99% of the speed of light, earth time is 41 years, ship time is 7 years.

At 50% of the speed of light, earth time is 144 years, ship time is 137 years.

At 20% of the speed of light, earth time is 395 years, ship time is 393 years.

At 10% of the speed of light, earth time is 719 years, ship time is 718 years.

It's only when you exceed 90% of the speed of light, that you start to get significant time dilation, and the ship time you have asserted, is only acheived at 99% of the speed of light, which; get real.

At the 3.3% speed of light of your (non existent) "Orion Drive!", there is no noticable time dilation at all.

[Speaker to Animals]

You exceed 75% after 1 year at 1 g, dude. Again, you don't understand the math.

All those numbers you just posted are totally wrong. Did you just make that shit up?

[Smitty-48]

You exceed 75% after 1 year at 1 g, dude. Again, you don't understand the math.

All those numbers you just posted are totally wrong. Did you just make that shit up?

There is no power source which will acellerate you at 1g for one year, you're talking 46,375,767,222 megajoules per kilogram of kinetic energy, so, invoking "constant acelleration for 1 year" is the same thing as saying "we'll use magic for fuel!"

[Speaker to Animals]

You exceed 75% after 1 year at 1 g, dude. Again, you don't understand the math.

All those numbers you just posted are totally wrong. Did you just make that shit up?

There is no power source which will acellerate you at 1g for one year, you're talking 46,375,767,222 megajoules per kilogram of kinetic energy, so, invoking "constant acelleration for 1 year" is the same thing as saying "we'll use magic for fuel"

OMFG

I already gave you a source that could provide you ONE HUNDRED TIMES that acceleration.

Since weight is no limitation, an Orion craft can be extremely robust. An unmanned craft could tolerate very large accelerations, perhaps 100 g. A human-crewed Orion, however, must use some sort of damping system behind the pusher plate to smooth the instantaneous acceleration to a level that humans can comfortably withstand – typically about 2 to 4 g.

https://en.wikipedia.org/wiki/Project_O ... ropulsion)

[Smitty-48]

Once again, read the specs, the "Momentum Limited" Orion Drive accerates at 1g for; 10 days, acheiving a maximum velocity of; 3.3% of the speed of light, for a one way, no slowdown flypast, it takes 133 years ship time just to get Alpha Centauri, which is only 4.4 lightyears.

3.3% of the speed of light to 40 lightyears, is going to take considerably longer; more than 1000 years ship time.

[Speaker to Animals]

Depends on the fuel. They were talking about specific designs, most of which were intended for intersolar travel.

The more fuel you pack on, the more frequent the bursts, the easier it is to maintain acceleration for the entire trip.

And that's Austin Powers tech right there. We know the EM drive works now.. That just takes a nuclear power plant to run.

[Smitty-48]

1g constant acelleration to 99% of the speed of light, would require 1,855,030,688,912.785 megajoules per kilogram of kinetic energy, that's more than 1.8 trillion megajoules per kilogram, since there is not even a theoretical way of generating even a tiny fraction of that energy, invoking "1g constant acelleration to 40 lightyears in 7 years shiptime" is not really any more realisitic than saying "warp drive" or "hyperspace", for all intents and purposes, it's all the same handwaving.

[Speaker to Animals]

We truly are not that far away from being able to travel to these places. Our limiting factor is access to fissionable material, which is why we need to subsidize these space corporations to get to mining ASAP.

[Speaker to Animals]

1g constant acelleration to 99% of the speed of light, would require 1,855,030,688,912.785 megajoules per kilogram of kinetic energy, that's more than 1.8 trillion megajoules per kilogram, since there is not even a theoretical way of generating even a tiny fraction of that energy, invoking "1g constant acelleration to 40 lightyears in 7 years shiptime" is not really any more realisitic than saying "warp drive" or "hyperspace", for all intents and purposes, it's all the same handwaving.

OMG

This is embarrassing, man. I don't know who gave you that quote, but it's idiotic. Megajoules *ARE* energy, man. And we are talking about thrust, not a power grid.