Search found 1134 matches
- Fri Nov 27, 2020 10:31 pm
- Forum: News
- Topic: Creating a magnetic field at a distance
- Replies: 11
- Views: 2662
Re: Creating a magnetic field at a distance
And Lentz (2020) explicitly suggested confined plasma as a gravitational source in his energy-condition-respecting superluminal soliton. It is an interesting theoretical paper but energy requirements for now are in the same range as Alcubierre drive, so it is out of our technological testing possib...
- Fri Nov 27, 2020 8:14 am
- Forum: News
- Topic: Creating a magnetic field at a distance
- Replies: 11
- Views: 2662
Re: Creating a magnetic field at a distance
I was thinking warp drive. I've often thought that if anything like the Woodward theory is possible, a very little confined plasma could in principle be excited to produce significant gravitational effects. And Lentz (2020) explicitly suggested confined plasma as a gravitational source in his energy...
- Wed Nov 25, 2020 2:04 pm
- Forum: News
- Topic: Creating a magnetic field at a distance
- Replies: 11
- Views: 2662
Re: Creating a magnetic field at a distance
Physical Review Letters: https://journals.aps.org/prl/abstract/1 ... 125.177204
Better?
Yes, it's paywalled, but you can at least read the abstract for free...
Better?
Yes, it's paywalled, but you can at least read the abstract for free...
- Sun Dec 01, 2019 1:15 am
- Forum: News
- Topic: Dark matter theories
- Replies: 35
- Views: 29999
Re: Dark matter theories
F/m = GM/r²
M = 100000000000 kg
G = 0.0000000000667408 m³/kg·s²
r = 0.001 m
F/m = 6674080 N/kg
r = 1 m
F/m = 6.67408 N/kg
m = 70 kg
F = 467.1856 N = 105 lbf
These things could be really dangerous...
M = 100000000000 kg
G = 0.0000000000667408 m³/kg·s²
r = 0.001 m
F/m = 6674080 N/kg
r = 1 m
F/m = 6.67408 N/kg
m = 70 kg
F = 467.1856 N = 105 lbf
These things could be really dangerous...
- Sat Oct 29, 2016 3:35 pm
- Forum: General
- Topic: boostrapping a mars colony
- Replies: 71
- Views: 26307
Re: boostrapping a mars colony
Technically the original 6502 was NMOS (as was the unlicensed clone in the Famicom/NES, if I'm not mistaken). The CMOS version was the 65C02, and it fixed a few bugs as well as tossing out the undocumented opcodes in favour of additional "real" opcodes. My experience, such as it is, is with the 5A22...
- Tue Aug 30, 2016 7:20 am
- Forum: General
- Topic: An Interesting SETI Candidate in Hercules
- Replies: 6
- Views: 4374
Re: An Interesting SETI Candidate in Hercules
https://en.wikipedia.org/wiki/Kardashev_scale
Is there a type of stellar maser that produces a single peak at ~11 GHz?
Is there a type of stellar maser that produces a single peak at ~11 GHz?
- Sat Aug 06, 2016 9:43 pm
- Forum: General
- Topic: Freon moderated reactor
- Replies: 15
- Views: 8789
Re: Freon moderated reactor
That is the big advantage of a NERVA style motor: it really doesn't care what type of "fuel" you push through it, as long as it doesn't interfere with the heating process. Since no one else has mentioned it, I'll just note that this is entirely untrue, for two separate reasons, neither of which has...
- Fri Mar 25, 2016 4:33 am
- Forum: News
- Topic: SpaceX News
- Replies: 2289
- Views: 761893
Re: SpaceX News
It was Jupiter IRBMs in Turkey. Atlas, being an ICBM, could hit its targets from much further away.
There are old Atlas and Titan bases scattered all over the continental U.S.; I believe there was something of a fire sale on them a while back.
There are old Atlas and Titan bases scattered all over the continental U.S.; I believe there was something of a fire sale on them a while back.
- Tue Feb 23, 2016 4:55 am
- Forum: General
- Topic: Can any of you Rocket heads explain this?
- Replies: 22
- Views: 10617
Re: Can any of you Rocket heads explain this?
I don't have a formal education in rocket design, but I should have enough expertise in the general area to figure out something like this. Lemme take a crack at it: What I don't get is how dumping exhaust gas from the turbine preburner into the combustion chamber boosts pressure. It doesn't. But in...
- Sat Jan 23, 2016 3:13 am
- Forum: General
- Topic: Planet Nine from Outer Space!
- Replies: 22
- Views: 9833
Re: Planet Nine from Outer Space!
I've got to say, I don't like the idea of calling it Nemesis. In the first place, Nemesis was supposed to be much further out than this thing; its orbital period would be a couple thousand times as long, and instead of perturbing the Kuiper belt to confuse astronomers with Sedna-like objects, it wou...
- Sat Aug 08, 2015 5:20 am
- Forum: News
- Topic: We Need Clean-Energy Innovation, and Lots of It - Bill Gates
- Replies: 8
- Views: 9970
Re: We Need Clean-Energy Innovation, and Lots of It - Bill G
Apparently he's backing a TWR.
- Thu Apr 02, 2015 2:08 am
- Forum: News
- Topic: NASA returning to NERVA?
- Replies: 44
- Views: 23248
Re: NASA returning to NERVA?
I would take Zubrin's opinion on this with a grain of salt. He seems to have something against VASIMR (probably because it conflicts with his own Mars scheme), and his arguments are overblown. Handwaving based on a tiny Russian reactor from the '70s is disingenuous, especially when studies of potent...
- Mon Mar 30, 2015 2:28 am
- Forum: News
- Topic: SpaceX News
- Replies: 2289
- Views: 761893
Re: SpaceX News
The block buy already covers the capability contract (the subsidy) for more launches than are supplied by the 36-core procurement. Besides, you're forgetting a couple of things - first, we were talking about Atlas*, and Delta is more expensive; second, ULA has other customers, who pay the lower pric...
- Fri Mar 27, 2015 12:49 am
- Forum: News
- Topic: SpaceX News
- Replies: 2289
- Views: 761893
Re: SpaceX News
No they don't.GIThruster wrote:Those Atlas V's cost $400M
- Wed Mar 25, 2015 8:32 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2289
- Views: 761893
Re: SpaceX News
Yeah, at least with a flywheel design it takes significant thrust efficiency to get net power, because the relative speed of the thruster with respect to the generating equipment it's reacting against has to be high enough that F · v (minus losses) exceeds the thruster's input power. I can't imagine...