Search found 1691 matches

by Tom Ligon
Wed May 17, 2017 8:01 pm
Forum: News
Topic: SpaceX News
Replies: 1748
Views: 147869

Re: SpaceX News

I knocked around some numbers a few years back when Arlan Andrews, Stephanie Osborn, and I were working on our scheme for an ejection seat that could make an orbital re-entry. We concluded it was possible. We were looking at a variation of the inflatable heat shields (IRVE) NASA has been experimenti...
by Tom Ligon
Mon May 01, 2017 7:41 pm
Forum: News
Topic: SpaceX News
Replies: 1748
Views: 147869

Re: SpaceX News

Neatly done!

Notice the nice distraction. Get everyone watching the landing and ignoring the payload. I wonder how often this one will pass over NK? The real news on this one is that this particular payload was not launched by ULA.
by Tom Ligon
Fri Mar 31, 2017 11:45 pm
Forum: News
Topic: SpaceX News
Replies: 1748
Views: 147869

Re: SpaceX News

Yes, indeed, this is a watershed moment in the space business. The birth of the used rocket business! :D Think about it ... for years now these things have been throwaways. How can that possibly be considered a mature technology? Now when you pick a rocket, you're making an investment, and you have ...
by Tom Ligon
Thu Mar 09, 2017 1:07 am
Forum: General
Topic: How to terraform Venus and provide fast transportation through out the solar system with this one weird trick
Replies: 11
Views: 612

Re: How to terraform Venus and provide fast transportation through out the solar system with this one weird trick

Fixing the atmosphere of Venus is the easy part. That chunk of rock has a day longer than its year. This could be even worse than being tidally locked to always have on side facing the Sun. In that condition, at least there could be a narrow habitable band at the terminator, between a side constantl...
by Tom Ligon
Fri Feb 17, 2017 9:36 pm
Forum: General
Topic: Naturally occurring geomagnetic EMP?
Replies: 2
Views: 265

Re: Naturally occurring geomagnetic EMP?

It is important to distinguish between EMP and geomagnetic storms. One is transient, the other is a long-lasting DC phenomenon. What the article describes is not an EMP. I recorded magnetic field strength variations in Northern Virginia over the course of the Halloween Storms. At one point I got a 7...
by Tom Ligon
Sun Jan 22, 2017 3:53 pm
Forum: General
Topic: God and Math
Replies: 1
Views: 283

Re: God and Math

That sounds like a good theoretical basis for Omniquantilism

http://freefall.purrsia.com/ff1400/fv01386.htm
by Tom Ligon
Fri Jan 20, 2017 4:25 pm
Forum: General
Topic: Liquid semiconductors
Replies: 5
Views: 339

Re: Liquid semiconductors

This makes me recall something that was under development back in the late 60's, but seems to have fizzled: microfluidics. They were making small-scale fluidic gates (elements that toggled between two stable paths of moving fluid) to implement logic chips on postage-stamp sized devices. The idea had...
by Tom Ligon
Fri Jan 20, 2017 4:17 pm
Forum: General
Topic: Sell The Whitehouse to Trump
Replies: 415
Views: 22953

Re: Sell The Whitehouse to Trump

As I understand history, the first few terms were pretty divisive, with major disagreements along party lines. Jefferson and Hamilton could not stand each other. John Adams would have had very low approval ratings due to the Alien and Sedition Acts. Jefferson was the butt of jokes due to his poor pu...
by Tom Ligon
Thu Jan 19, 2017 12:21 am
Forum: General
Topic: Sell The Whitehouse to Trump
Replies: 415
Views: 22953

Re: Sell The Whitehouse to Trump

That video is darned revealing.

I wonder if they could find the data to extend it back to 1840 or so? I would expect a similar pattern leading up to the Civil War.
by Tom Ligon
Tue Jan 17, 2017 7:10 pm
Forum: General
Topic: Sell The Whitehouse to Trump
Replies: 415
Views: 22953

Re: Sell The Whitehouse to Trump

All I can say at this point is: https://heavyeditorial.files.wordpress.com/2017/01/screen-shot-2017-01-11-at-10-32-18-am.jpg?quality=65&strip=all&w=780 My feelings about this are pretty much summed up by this article. The pee story probably is no more true than the fake news stories that Tru...
by Tom Ligon
Sat Jan 14, 2017 11:32 pm
Forum: News
Topic: SpaceX News
Replies: 1748
Views: 147869

Re: SpaceX News

Neatly done!

Now, for about ten more in a row to prove it was not a fluke. I'm not trying to be harsh, but this is a fix after a catastrophic failure, the second in an upper stage oxygen tank, and it needs repeats to increase confidence that they really caught the cause.
by Tom Ligon
Wed Dec 28, 2016 7:51 pm
Forum: General
Topic: Magnetic forces are favored?
Replies: 9
Views: 433

Re: Magnetic forces are favored?

I've seen a few vain attempts to try to say that electrostatics, not magnetism, hold galaxies together. The problem is one of dipoles versus monopoles. Yeah, electrostatic attraction is double-digit orders of magnitude stronger than gravity, but it only attracts when you have opposite polarities. If...
by Tom Ligon
Wed Dec 28, 2016 2:18 am
Forum: General
Topic: Magnetic forces are favored?
Replies: 9
Views: 433

Re: Magnetic forces are favored?

Your post reminded me to look up the math behind the quadrupole mass spectrometer. The quadrupole uses crossed electric fields, produced by four electrodes in opposing pairs at right angles. These are common in modern labs. I installed one on PXL-1 and WB-3 to analyze residual gas. Most residual gas...
by Tom Ligon
Wed Dec 28, 2016 1:55 am
Forum: General
Topic: Magnetic forces are favored?
Replies: 9
Views: 433

Re: Magnetic forces are favored?

Electrostatic fields were pretty well investigated by the vacuum tube folks, and exploited commercially. Now most people find that technology passé. They were the basis for particle accelerators ranging from Time of Flight Mass Spectrometers to the first Atom Smashers. But I guess when they started ...
by Tom Ligon
Mon Dec 05, 2016 3:31 am
Forum: General
Topic: Aleta Jackson has passed away ...
Replies: 1
Views: 305

Aleta Jackson has passed away ...

I don't know how many of you knew Aleta Jackson personally. She's been a fixture in the space community for decades. I first met her when she was the "Gal Friday" of the L5 Society. Many years later, I was rolling my Dog and Pony Show fusor into a room at a SF Con in Scottsdale, when I ran...

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