Search found 31 matches

by eros
Thu Feb 26, 2009 6:53 pm
Forum: Theory
Topic: Scaling laws...
Replies: 7
Views: 3262

And ohmic heating in copper coils scales linear with wire lenght. Wire lenght scales up r² if you grow coil volume too. That make ohmic coils quite unpractical. Art can maybe do some calculation how much it take power to feed say 6pcs 1m coils if coil diameter is 10cm and B=1T. Assume that coil mate...
by eros
Thu Feb 26, 2009 6:37 pm
Forum: Theory
Topic: Where in the magnets are the field lines?
Replies: 6
Views: 2314

superconductors are not magnetic

Superconducting magnets generating field depends only inside currents. Only limiting thing is critical current. High fields itselfs are not limit, but they generate repulsion currents. You can find some proof with "freezing fields" words. Sc internal structure and current loops say how wel...
by eros
Thu Dec 11, 2008 11:58 pm
Forum: Design
Topic: WB6 Coil question
Replies: 40
Views: 13033

After just reading the above post and associated posts I am suspicious of the above calculations. Perhaps he multiplied diameter by 7 as opposed to using the 7th power of diameter. I'm too lazy to carefully follow the math, but using examples with the presumed power gain = diameter to the 7th power...
by eros
Thu Dec 04, 2008 7:49 pm
Forum: Theory
Topic: Polywell for Space Propulsion
Replies: 27
Views: 7692

If ever BFR used star traveling trips, then it should burn H2. It give maximum energy per kg. Neutrons should capture to LH2 jacket and produce D2. Neutron escape to space is energy loss. Alphas produce electricity, after that they come 2nd BFR burn further etc until we are in Fe. After that Fe ions...
by eros
Thu Nov 20, 2008 3:31 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 10421

Actually it is human nature. Males are warriors. And worse is alpha males want to control stuff. Maybe some, but not all people. Propeties that are bad should reduce in Darvin cycles. The idea that it is TV and Hollywood is nuts. For American Plains Indians there was no Hollywood in 1800 and yet th...
by eros
Thu Nov 20, 2008 2:29 pm
Forum: Design
Topic: massive megahertz multi megawatt magnetron
Replies: 18
Views: 6098

Dr. Mike: http://www.fingrid.fi/uploads/ConstructionSiteMap/attachments/esite.pdf It is an air insulated 400KV DC converter. It is not small. It is twenty years old thecnology. I was small boy when they build it. I remember some articles and thinked why they want use DC to carry energy. It is so co...
by eros
Thu Nov 20, 2008 1:53 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 10421

Kiteman, I'm suggesting what could be done if some one was bloody minded. Why to scare? If BFR works it give so much good that there is no more need to make oil wars etc. And after US stop saying what other countries are allowed to do there is no angry terrorist against US. Fundamentals (idiots) be...
by eros
Thu Nov 20, 2008 1:33 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 10421

using a deuterium or lead blanket would work well as a way of capturing the energy from the neutrons. Though it's my lack of knowledge in certain areas of nuclear technology, but I thought that fission produced thermal energy as well as neutrons. When neutrons and gammas hit material, they produce ...
by eros
Tue Nov 18, 2008 9:37 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 10421

Re: A new nuclear power device

The theory is that nuclear fission and fusion can be used to help each other, especially in the case of a standard fusor. How you handle fission waste products? How capture fission neutrons energy? What fission things help fusion? Ok, on/off neutron source maybe, but fission waste make off situatio...
by eros
Tue Nov 18, 2008 6:26 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 12288

Where do I put the at sign? Too hard, ok, easyer now? eerin at xylogas. fi I read some: http://www.talk-polywell.org/bb/viewtopic.php?t=66&highlight=permanent+magnet I see now it is posible to magnetize permanet magnet ring correctly. But correctly magnetized permanent magnet field lines keep i...
by eros
Mon Nov 17, 2008 5:56 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 12288

How can winding a ribbon around a spool be a harder problem than assembling a bunch of stampings? I think Bitter idea is resist magnet forces, so windins need to be disks that carry expansion better and are bolted with end plates together to keep plates not expoloding away. Cooling is also quite ea...
by eros
Mon Nov 17, 2008 5:41 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 12288

by eros
Mon Nov 17, 2008 5:39 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 12288

It is where the field lines converge. In an electromagnet they converge in "empty" space. In a permanent magnet they converge on the face of the magnet. Draw a picture - it will be obvious. In an electromagnet the field lines go around the coil. In a permanent magnet they enter one face a...
by eros
Sat Nov 15, 2008 5:27 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 12288

Permanent Magnets won't work. The field lines are in the wrong place. Electromagnets are the only way. This has been discussed extensively on this board. Look around. Uh, not find yet, there are so much text it take month ore more to read all. However I can't yet imagine why they can't magnetize li...
by eros
Sat Nov 15, 2008 2:04 pm
Forum: Design
Topic: A really powerful design tool for free
Replies: 8
Views: 4389

C'mon, guys. If you're going to do serious CAD, you have to spend some money. It's just the way the world works. Works now, but things can change. GPL is powerfull thing if enough skilled people thinks they need free CAD they can do it. In my job I use IronCad, which is the cheapest "full-feat...

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