Search found 155 matches

by cuddihy
Tue Aug 12, 2008 1:39 am
Forum: General
Topic: Vasmir Engine To Be Tested In Space
Replies: 3
Views: 3060

Re: Vasmir Engine To Be Tested In Space

* http://www.dailytech.com/Commercially+Developed+Plasma+Engine+Soon+To+Be+Tested+In+Space/article12612.htm * The new rocket is named Variable Specific Impulse Magnetoplasma Rocket (VASIMR). A traditional rocket can produce a specific impulse of around 450 seconds, or in other words 1 pound of thru...
by cuddihy
Thu Aug 07, 2008 10:32 pm
Forum: General
Topic: Propulsion development
Replies: 27
Views: 15271

Simon, Sure, based on the raw power reqs that makes sense. But I'm doubtful that can actually happen, given a Polywell's complexity, cooling reqs, and the need for a 5-10MW input to run the reactor. My guess is this only goes on something that already has one or more diesel/fission engines. Well, a...
by cuddihy
Wed Aug 06, 2008 9:32 pm
Forum: News
Topic: New Energy Reports the Latest
Replies: 59
Views: 37703

Yes, I do agree also. Secrecy can at best give only a short term advantage. Once it's known to work, it can be built from scratch by any number of states/organizations. Secrecy would buy the navy a lot more time than it will buy EEStor, I think though. Consider that if a BFR were built inside an ai...
by cuddihy
Wed Aug 06, 2008 9:28 pm
Forum: Implications
Topic: So... what if it didn't work?
Replies: 29
Views: 23028

Similarly I think requesting $100 million dollars when you still don't really know what's going on inside your little machine would be a big mistake. It would be setting the project up for a fall. 100 million dollars may not be much for solving the world's energy problems but it is not good value f...
by cuddihy
Sat Aug 02, 2008 1:55 am
Forum: News
Topic: More EEStor news
Replies: 40
Views: 28185

Unfortunately, it reminds me entirely too much of the kinds of press releases Gary Hudson had Rotary Rocket putting out for most of the late 90's..."Processes certified! Progress is being made! First increment completed!" (unstated was that it was the only increment they could afford given that they...
by cuddihy
Tue Jul 22, 2008 4:41 am
Forum: Theory
Topic: The problem with ion convergence
Replies: 126
Views: 63117

you're using prob(fus) =i*n_0*sigma*r_c; geometry independent. Implies the central 10% of the device (0.1 m?) is an undifferentiated, isotropic thermal distribution. sigma is geometry independent, per Art's equation above. No, I was assuming all the ions have 1-D motion and they will only interact ...
by cuddihy
Sun Jul 20, 2008 3:48 am
Forum: Theory
Topic: The problem with ion convergence
Replies: 126
Views: 63117

There is another way to look at this calculation. It is the number of deflections that occur driving ions off center due to coulomb interactions. In that sense it's really good - on any one pass there are very few deflections and ions should stay radial for a good number of passes. The cross sectio...
by cuddihy
Sat Jun 21, 2008 4:24 am
Forum: General
Topic: Ya Gotta Be A Little Bit Crazy
Replies: 11
Views: 6048

Re: it's not that cut and dried

My snarky comment raised a question in my mind: The Farnsworth fusor can't achieve net power output b/c the charged grid has a transparency of better than 90%, but not 100%. sort of. Fusors can't achieve net power for reasons that may be simply, but only imprecisely boiled down to, "excess loss of ...
by cuddihy
Sat Jun 14, 2008 3:30 am
Forum: News
Topic: Another one from Alan Boyle
Replies: 52
Views: 34382

Maybe they could get Todd Rider or Richard Hull on the peer review, when the toughest skeptics are convinced then you can pretty much guarantee it works. The toughest skeptics are usually those who have opinions they're unwilling to change no matter what the evidence is. While Richard Hull strikes ...
by cuddihy
Sat Jun 14, 2008 3:22 am
Forum: News
Topic: Another one from Alan Boyle
Replies: 52
Views: 34382

Re: rnebel answers Art Carlson

Art Carlson posted a comment to Alan Boyle's article (June 13, 1:17 PM). As usual it was hard critic. The surprise is that this time some rnebel (our rnebel?) posted a very interesting and informative answer to Art (June 13, 2008 6:17 PM). I dont know if it's right to copy Art's critic and rnebel's...
by cuddihy
Tue Jun 10, 2008 1:44 am
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 277391

Ok, Tombo I think I see a potential problem with your coil formation, most visible to me on http://i299.photobucket.com/albums/mm317/tombo1234/PolywellC-8-hedron4CircuitA-2.jpg It's not a problem "inside" the device so much as realizing that a recirculating machine means that both "inside" and outsi...
by cuddihy
Sun Jun 08, 2008 4:52 pm
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 277391

About the rf plugging pdf: the coils are all just encircling the central axis. There is probably a coil on either side of the line cusp in the diagram, so that both coils have their same poles (ie, N to N or S to S) facing each other. There's no line cusp (as far as I can tell) on the polywell; tha...
by cuddihy
Sat Jun 07, 2008 8:47 pm
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 277391

electron plasma really just superimposes it's own field over the field from the coils, Yes, that looks good. But, I’m still not sure how the plasma ball assumes a spherical shape without peaks at the coil centers & corners. True, there are peaks at the coil centers & corners. To see this in action ...
by cuddihy
Sat May 31, 2008 5:09 pm
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 277391

Hello Simon, I was under the (perhaps mistaken) impression that the WB series had all their magnets' North face pointing inwards; and that the return pole was a virtual magnetic face through the holes where three circles "meet". Certainly Indrek's visualisations imply this. Please feel free to corr...
by cuddihy
Fri May 30, 2008 8:02 pm
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 277391

<snip> A similar field configuration would result if the 6 cube coils were replaced with 8 coils at the corners where the virtual coils are. The original coils would now be the virtual coils. Like this: http://i299.photobucket.com/albums/mm317/tombo1234/CornerViewPolywellCubeCoilsPlusE-1.jpg Or fin...