Search found 722 matches

by kcdodd
Tue Apr 28, 2015 5:06 am
Forum: News
Topic: EM Drive
Replies: 693
Views: 243294

Re: EM Drive

It's been a while since I posted in this forum, and I really don't care to be involved in the arguments here. But I find the topic somewhat interesting. I originally completely dismissed the entire EM-drive stuff because it seems obviously wrong. And I still think most of the "explanations"...
by kcdodd
Wed Dec 25, 2013 3:49 am
Forum: Theory
Topic: plasma density in magnetic bottle
Replies: 12
Views: 5731

Re: plasma density in magnetic bottle

It's typically bell shaped peaked in the middle. H-mode in a tokamak has a more steep profile at the very edge called the pedestal due to a transport barrier, then bell shaped toward the middle. Either way it really has to have only one maximum on the macroscopic average since transport tends to sme...
by kcdodd
Sun Dec 15, 2013 2:47 am
Forum: Theory
Topic: particle simulation using fast multiple method
Replies: 45
Views: 10607

Re: particle simulation using fast multiple method

What I meant to ask is does it use the electrostatic approximation (and magnetostatic). I.E. instantaneous field E1 = kq2(r1-r2)/(r1-r2)^3.
by kcdodd
Sat Dec 14, 2013 10:48 pm
Forum: Theory
Topic: particle simulation using fast multiple method
Replies: 45
Views: 10607

Re: particle simulation using fast multiple method

Is this static or full EM?
by kcdodd
Wed Dec 04, 2013 8:27 pm
Forum: Theory
Topic: help with kernel for fast multipole method.
Replies: 4
Views: 2018

Re: help with kernel for fast multipole method.

You might consider doing it numerically and store the result in the most general way possible for lookup. I try to formulate them in dimensionless parameters so it can be re-scaled easily.
by kcdodd
Wed Dec 04, 2013 7:45 pm
Forum: News
Topic: SpaceX News
Replies: 2275
Views: 462031

Re: SpaceX News

Last I heard they were not going to try any recovery this time.
by kcdodd
Sat Sep 28, 2013 2:36 am
Forum: News
Topic: Radially-Magnetized, Permanent Magnet, Multi-Grid Fusor
Replies: 10
Views: 8247

Re: Radially-Magnetized, Permanent Magnet, Multi-Grid Fusor

It seems like each hole is physically identical to a current loop. If you look at the bound current in the magnets. I don't know why there would be any difference from an electromagnet.
by kcdodd
Thu Sep 26, 2013 8:44 pm
Forum: News
Topic: Is the National Ignition Facility (NIF) getting close?
Replies: 15
Views: 4909

Re: Is the National Ignition Facility (NIF) getting close?

I just hang around here in case one of them comes up with a 5+ GW p-11B aneutronic power source for my supercruising vectored-thrust BWB SSTO backyard space-hopper.


I would love to see the design :)
by kcdodd
Mon Sep 23, 2013 8:18 am
Forum: News
Topic: SPM - Criticism Welcome
Replies: 6
Views: 3091

Re: SPM - Criticism Welcome

No it is not finished yet. I am about half way equipment-wise on this first leg of the journey. But, I can make some plasma right now. Just getting my toes wet. Haven't set sail quite yet.
by kcdodd
Sat Sep 21, 2013 7:40 pm
Forum: Theory
Topic: Neutron Bursts in Lab Lightning
Replies: 2
Views: 1781

Re: Neutron Bursts in Lab Lightning

nuclear reactions in air?
by kcdodd
Thu Sep 19, 2013 2:21 am
Forum: News
Topic: SPM - Criticism Welcome
Replies: 6
Views: 3091

Re: SPM - Criticism Welcome

Just something to look at: http://youtu.be/N10VWbdBHN8
by kcdodd
Sun Sep 15, 2013 3:11 am
Forum: News
Topic: NASA-backed fusion engine could cut Mars trip down to 30 day
Replies: 8
Views: 4404

Re: NASA-backed fusion engine could cut Mars trip down to 30

Yeah travel time says more about the exhaust velocity of the rocket, or specific impulse, than about the thrust. Unless of course the thrust is so low that acceleration becomes the majority of the travel time.
by kcdodd
Fri Sep 06, 2013 6:15 am
Forum: News
Topic: Mach Effect progress
Replies: 2667
Views: 622047

Re: Mach Effect progress

You already know what my point is. You just stated it. "...one can't verify momentum exchange against the universe." Why are you asking me what my point is? But, of course, I may not understand the problem as you say. But that is my point anyway. If you disagree you have two options. One i...
by kcdodd
Fri Sep 06, 2013 5:21 am
Forum: News
Topic: Mach Effect progress
Replies: 2667
Views: 622047

Re: Mach Effect progress

Carter, you're demanding answers to questions you don't understand. You don't get how annoying this is? I'm doing my best to explain what science is all about and at every turn you IGNORE what is said to you and press on with childish assumptions. I'm not exaggerating, nor acting all dopey, when I ...
by kcdodd
Fri Sep 06, 2013 4:09 am
Forum: News
Topic: Mach Effect progress
Replies: 2667
Views: 622047

Re: Mach Effect progress

Geeess. . . This is why no one puts much stock in cheesy engineering claims. People like you PRETENDING THEY KNOW WHAT THEY DON'T. Woodward's theory mandates conservation by use of Noether's Theorem. Any differentiable symmetry of the action of a physical system has a corresponding conservation law...

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