Subject:
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Re: Transit Time to Mars
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Thu, 16 Dec 1999 09:07:33 GMT
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Reply-To:
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Selçuk <teyyareci> <SGORE@SUPERONLINE.nomorespamCOM>
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Viewed:
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397 times
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James Powell <wx732@freenet.victoria.bc.ca> wrote in message
news:FMt9In.55E@lugnet.com...
> > Solid fuel rockets are essentially big fireworks: ya light 'em and they
> > burn until nothing is left. They are great bang for your buck, but they
> > don't last long. And in your scenario, you still have to get the • boosters
> > up to the space station.
>
> Actually, you can make them burn at almost any rate you want to. It is a
> question of how much exposed area there is to burn at once. The SRB • motors
> have a * shaped hole in the middle of them right from top to bottom. This
> produces a very large amout of thrust (2 million Lb's each, IIRC), but a • burn
> time of in the order of 60 sec. If you had a 80 ft long motor that was • solid,
> end burning, it would last much longer (at least, in a ideal world). How • much
> longer depends on your choice of fuel...are you using Iron and Oxygen? or
> Aluminum Perclorate? Or TNT?
>
> I have a nice book on the subject, Rocketry and Space Travel, which goes • into
> some detail about the early rocketry experiments.
>
> (oh, I would argue with Larry about the easiest way -right now- to get a • 1G
> acceleration out of earth's atmosphere/fallout range...use a Nuclear • rocket, a
> la the USAF experiments...Not good in Atomosphere, but not a whit of • difference
> in space.)
>
> James P
>
> James Powell
Wow!..My first job was designing these "*" for a desired trust rate..:-)
Selçuk
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Message has 1 Reply:
 | | Re: Transit Time to Mars
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| I think the problem with long-burn-time solid fuel engines is that the nozzle heats up so much that it erodes rapidly. Typical liquid-fueled engines cool the nozzle with the fuel just before it's burned. IsThere some Space-Age (Pardon the ancient (...) (25 years ago, 16-Dec-99, to lugnet.off-topic.geek)
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Message is in Reply To:
| | Re: Transit Time to Mars
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| (...) Actually, you can make them burn at almost any rate you want to. It is a question of how much exposed area there is to burn at once. The SRB motors have a * shaped hole in the middle of them right from top to bottom. This produces a very large (...) (25 years ago, 16-Dec-99, to lugnet.off-topic.geek)
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