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Re: starship-design: space propulsion
In a message dated 5/28/00 8:41:20 AM Pacific Daylight Time,
> There is a good synopsis of current space propulsion research at:
> "Reaching for the stars
> Scientists examine using antimatter and fusion to propel future spacecraft"
> This is from the 10th annual Advanced Propulsion Research Workshop.
Here is a more interactive detailed link:
Nuclear fission has an energy density of 8 x 1013 J/kg as compared to
chemical reactions with an energy density of 1 x 107 J/kg. This high energy
density make fission appealing for propulsion. However, most fission
propulsion concepts use energy from a fission reactor to heat a propellant
"working fluid" gas (e.g., hydrogen) which then expands through a nozzle to
produce thrust. Ultimately, engine materials structural temperature limits
restrict these systems to specific impulses of less than 7,000 lbf-s/lbm.
Fission-fragment propulsion involves permitting the energetic fragments
produced in the nuclear fission process to directly escape from the reactor;
thus, the fission fragments, moving with a velocity of several percent of the
speed of light, are the propellant working fluid. Because these fragments are
heavily ionized, they can be directed by magnetic fields to produce thrust
for propulsion. Specific impulse in excess of 1 million lbf-s/lbm is possible
------- end quote
Makes me wish I knew how to calculate the specific impulse for my engine ;=)
I found the above link from
A personal page of a space buff with loads of related links. I wouldn't mind
him joining this group.
My star ship site got hit with 800 hits in two days with no advertising.
I found my site linked in
<A HREF="http://www.crank.net/science.html">Crank Dot Net | science</A>
along with Nasa's advanced propulsion system site. One labeled crankish and
the other labeled illucid by the submitter.
Oh well ;) Bad publicity and good company is better than none.
<A HREF="http://members.aol.com/tjac780754/indexda.html">A Definitive
Analysis of Atomic Power</A>
<A HREF="http://members.aol.com/tjac780754/indexb.htm">Plasma Rocket Engine</