Search found 3061 matches

by Giorgio
Tue Mar 07, 2023 11:57 am
Forum: News
Topic: TAE completes first tests of hydrogen-boron fuel cycle
Replies: 11
Views: 1967

Re: TAE completes first tests of hydrogen-boron fuel cycle

Any clue how much hotter you might make p11b in the same trap as DT? Interesting paper. I am wondering what densities TAE is going to use. We need to consider that this paper was just a theoretical one that served as the framework for the actual experimental set up, and the cited "Shot number" in t...
by Giorgio
Mon Mar 06, 2023 3:45 pm
Forum: News
Topic: TAE completes first tests of hydrogen-boron fuel cycle
Replies: 11
Views: 1967

Re: TAE completes first tests of hydrogen-boron fuel cycle

Here is a link to the article on raised p11B fusion rates (from 2019) - up 30%. 'Fraid I don't have access to the full text to know what that really means. https://iopscience.iop.org/article/10.1088/1741-4326/ab1a60 This paper is available on TAE website just click HERE . The summary of the article...
by Giorgio
Sat Mar 04, 2023 7:45 pm
Forum: News
Topic: TAE completes first tests of hydrogen-boron fuel cycle
Replies: 11
Views: 1967

Re: TAE completes first tests of hydrogen-boron fuel cycle

It is worth noting that the result was achieved on the "Large Helical Device" (LHD) which is a Stellarator type of machine like the W7-X! The LHD has been developed to reduce plasma vortex turbulence diffusion, while the W7-X has been developed to reduce ions-electrons collisional diffusion, and the...
by Giorgio
Mon Feb 27, 2023 12:02 pm
Forum: Theory
Topic: Stellarators with Permanent Magnets
Replies: 21
Views: 9440

Re: Stellarators with Permanent Magnets

--- permanent magnets have a reactive behavior so their response to reach a new equilibrium position is slower than a coiled superconductor --- I wonder if different permanent magnetic materials have different response times ? I might also wonder if different material superconductors also have diff...
by Giorgio
Mon Feb 27, 2023 11:55 am
Forum: Theory
Topic: Stellarators with Permanent Magnets
Replies: 21
Views: 9440

Re: Stellarators with Permanent Magnets

Which begs a question, due to my interest in permanent magnetic gearing, how much flux energy will a permanent magnet lose over time ? That depends on the use (and abuse) you do of the magnet. While there is no general formula to calculate it, you might consider that a modern magnet in isolated env...
by Giorgio
Fri Feb 24, 2023 7:09 am
Forum: News
Topic: Wendelstein 7-X
Replies: 56
Views: 79405

Re: Wendelstein 7-X

There is still lot of road ahead before it can express its full potential, but the results so far are way better than expected. It's a beautiful piece of engineering art. Well it is German. So were the Tiger 2 and the V 2. Both were useless. From a practical point of view you are right, WX-7 will i...
by Giorgio
Thu Feb 23, 2023 8:51 pm
Forum: News
Topic: Wendelstein 7-X
Replies: 56
Views: 79405

Re: Wendelstein 7-X

There is still lot of road ahead before it can express its full potential, but the results so far are way better than expected.
It's a beautiful piece of engineering art.
by Giorgio
Fri Feb 03, 2023 9:28 pm
Forum: News
Topic: NT-Tao (Israeli fusion company)
Replies: 4
Views: 1250

Re: NT-Tao (Israeli fusion company)

Without giving away all of its secrets, NT-Tao said it is taking the best of Tokamak technology and the best of stellarator technology and are refining those technologies to make a new design that will operate at significantly higher plasma density. The machine can heat up the plasma to huge temper...
by Giorgio
Fri Feb 03, 2023 9:06 pm
Forum: News
Topic: World-first "impossible" rotating detonation engine fires up
Replies: 15
Views: 9626

Re: World-first "impossible" rotating detonation engine fires up

If you can ship it there from the moon in a 5T craft, and return the craft to the moon, it costs 171 T of fuel. Much more interestingly, the same SSTO can now take 40T to LEO instead of 10 with little more total fuel cost. The fuel per tonne to LEO drops 72%. In honor of truth, with the increasing ...
by Giorgio
Wed Feb 01, 2023 12:59 pm
Forum: News
Topic: World-first "impossible" rotating detonation engine fires up
Replies: 15
Views: 9626

Re: World-first "impossible" rotating detonation engine fires up

93143 wrote:
Wed Feb 01, 2023 12:00 pm
That's an air-breathing concept.
That's true and they explain it clearly in the introduction paragraph to their paper.
by Giorgio
Wed Feb 01, 2023 8:35 am
Forum: News
Topic: World-first "impossible" rotating detonation engine fires up
Replies: 15
Views: 9626

Re: World-first "impossible" rotating detonation engine fires up

Indeed. It was just a quick apple to apple comparison to evaluate what the different ISP will allow. The logic (and the relative results) is similar if you will compare the the various technologies with their vacuum ISP. And if you are interested you can give a look to the experiments going on in th...
by Giorgio
Tue Jan 31, 2023 11:43 pm
Forum: News
Topic: World-first "impossible" rotating detonation engine fires up
Replies: 15
Views: 9626

Re: World-first "impossible" rotating detonation engine fires up

Using Joe's DeltaV calculator and Starship and Raptor as a baseline: Assuming: 410s average Isp with an RDE ( 25% would be an 87 second improvement, so 410 might be conservative) Dry mass: 100 tonnes. That does not even account for structural mass savings through the reduced payload fairing size (o...
by Giorgio
Sun Jan 29, 2023 11:01 am
Forum: News
Topic: World-first "impossible" rotating detonation engine fires up
Replies: 15
Views: 9626

Re: World-first "impossible" rotating detonation engine fires up

Very excited about those kinds of engines. They could make SSTOs possible. During the X-33 period I explored the SSTO math and it come out that you will need an ISP of around 2000 to make a meaningful and practical SSTO rocket/plane. The detonating engine design has a theoretical efficiency improve...
by Giorgio
Wed Jan 25, 2023 10:44 pm
Forum: News
Topic: Lockheed Martin news
Replies: 56
Views: 92144

Re: Lockheed Martin news

In truth the whole project was just a soup of older concepts without any real innovative idea.
Probably they was aiming for some grant and when they saw that no one was biting to the project they simply pulled the plug and moved to something else.
by Giorgio
Sat Jan 21, 2023 7:12 pm
Forum: News
Topic: Helion Energy to demonstrate net electricity production by 2024
Replies: 660
Views: 104490

Re: Helion Energy to demonstrate net electricity production by 2024

I tried. It got deleted. Go figure. That guy is a complete jerk. Not only him. I also tried few times in the past to correct wrong information on video of other channels, but if you do not follow their narrative they just delete you. It seems that this has become a standard procedure on youtube. Ju...