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Re: Wanted: practical launch vehicle, cheap!

PostPosted: Mon Sep 13, 2010 1:42 am
by Colonizer
similer ya but not sheir it would even work plus how would it stay up and will there be thik enough air to breath. just not shear about it but a space elevator to the ground would be in trouble.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Mon Sep 13, 2010 6:01 am
by Intranaut
I'll be honest here I'm not too certain I understood all of that. 'sheir'?
But as to the breathing issue, if that's a problem for you I'd have to question how you plan to deal with the vacuum of space.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Mon Sep 20, 2010 1:08 am
by Colonizer
sarry im talking about if the planet side station was in the air not on the ground deppending on height for breathing. sheir like sher why not.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Mon Sep 20, 2010 7:30 am
by Intranaut
Ooooh 'sure'.
Well I think James said something about the station being able to be held up by the orbiting station. I can't confirm if that's true, but assuming it is, you'd have to be able to land planes, helicopters or even balloons on it. And as I said before, if you can't deal with breathing in a low air pressure environment you really oughtn't be heading into the biggest vacuum in existence.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Sat Nov 13, 2010 1:46 am
by Colonizer
is there some kind of laser lift that dosent damge what its lifting from. or can they use a magnetic system to get them selves up. my friend talked about this one magnit 1x1 inch can lift a person on a skate board 3 to 5 stores high without perpulshin think what it could do.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Sat Nov 13, 2010 5:57 am
by Intranaut
I'm not certain of how all of it works exactly, but I believe in the space elevator concept the carriage could be powered by a laser.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Sat Nov 13, 2010 3:49 pm
by Colonizer
If that magnit thing works put it in the armor or shell of the ship could help on lift in to attmispher but not so sure on if the weight is to much.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Fri May 27, 2011 4:50 pm
by RickLewis
There is an interesting article in the New Scientist ('Beam Riders' 30th April 2011, pp38-41) about another completely different approach to getting payloads into Earth orbit.

According to that approach, as a spacecraft lifts off and rises from the Earth, an Earth-based laser or microwave beam would continuously send energy up to it, which would then heat up either a propellant carried on board ship, or else air which the spacecraft sucked in from the surrounding atmosphere (those are the main two competing variants). Either way, the heated propellant would then be expelled very fast from the spacecraft to keep it accelerating towards orbit.

One problem is that the Earth-based laser or microwave beam would be trying to hit a tiny and continually receding target. This doesn't seem insurmountable and feedback mechanisms can help keep the beam locked on target.

Another problem is that even a laser beam will spread out as it goes, so that some sort of wing may have to be deployed by the spacecraft to catch all the incoming energy.

You might think this is a bonkers approach, but apparently people have been working on the theory for a few decades; the principle has been demonstrated in the laboratory; and Carnegie Mellon University has spent a couple of million on a suitable microwave source for future testing. Apparently, they and NASA hope that this approach could dramatically reduce launch costs compared with chemical rockets.

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Fri May 27, 2011 4:53 pm
by RickLewis
The article itself seems to be for subscribers only on the New Scientist website, but here is a blofg posting about it which also contains a link to the article:

http://views-on-science.blogspot.com/20 ... iders.html

Re: Wanted: practical launch vehicle, cheap!

PostPosted: Mon Jul 11, 2011 9:24 pm
by Colonizer
interesting... man its good to be back i had forgotten password and such since my main computer crashed