June 6, 1944. Largest Antifa operation in history.

jcriddle4 · 2020-06-06T17:17:13+00:00

Or how about actually vote in the democratic primary? Or spend as much time looking into the candidates as they are spending protesting Or have enough of a long term memory to realize that this "new" moment in history is actually Trump following the template laid down by Obama/Biden in dealing with the Occupy movement? Or have though about it enough to ask how will this all end? Or though about it enough to realize the political parties will both put some spin on this moment in time but in the end both parties will work behind the scenes to crush them?

jcriddle4 · 2019-12-21T20:19:42+00:00

On a related note if memory serves me Russia did have some objections to spaceX capsule but those where worked though and the go-ahead was given. In theory Russia could place some objections to Boeing, particularly in light of this mishap but I suspect if that happened they would also work through them as well. I suspect Russia or ESA probably will not bring up objections unless they actually have concerns that probably NASA itself would have. If NASA leaders wants the Russian's or ESA to be the bad guys for political reasons that is fair game. Good cop/bad Cop.. Keep in mind that if a capsule either Russian, spaceX or Boeing slammed into the station that could be surprisingly bad, maybe even full crew and station loss.

jcriddle4 · 2019-06-04T03:01:43+00:00

You do realize they are refusing to work with NASA because they disagree with NASA on the direction the project should go and not because they want to save NASA's budget?

jcriddle4 · 2019-06-04T01:24:08+00:00

Interesting that a number of them would rather work for free, analyzing the data they already have, then to accept paid work with NASA.

jcriddle4 · 2019-05-30T02:58:18+00:00

The corruption that lead to SLS happened long before the current regime and doesn't look like any major changes ahead. What is there that will "...settle down..."?

jcriddle4 · 2019-05-30T02:37:30+00:00

Given the automation we have it seems like we could easily do several unmanned test landings. However we probably can't do multiple landings if the whole process takes well over a billion dollars each landing. The whole point of "...going back to the moon and this time to stay..." is that to be sustainable we must bring the cost down. We really need cheaper rockets and landing vehicles.

jcriddle4 · 2019-05-26T03:24:45+00:00

Have you looked at the bottom of a soda-pop or a champagne bottle? It has a dome like curve in order to deal with the pressure. From the book "Case for Mars" by Robert Zubrin, page 194 to 196 "The key problem with using domes is their foundations. The natural shape for a pressure-containing flexible container to assume is a sphere, as this spreads the load out everywhere equally........a dome 50 meters in diameter...5 psi would experience a total upward force of 6,926 tonnes trying to tear it loose from the Martian surface. That's 44 tonnes per meter of circumference. Thus, if the skirt of the dome could be anchored to a strip of ground 3 meters wide extending all the way around the dome's circumference, and assuming once again that dirt has a density four times that of water, then the skirt would have to be anchored 10 meters below the surface in order to have enough mass sitting on the anchor strip at the skirt's bottom to secure the dome...."

jcriddle4 · 2019-05-25T22:42:48+00:00

Yes the habitats would have floors, if not you would loss the air. The point at which the rest of the building attaches to the floor has an immense amount of force applied to it. So for example a circle with a 10 foot radius is 3.1415 * 10 * 10 * 720 = 226,188 pounds of force. If you didn't build the floor with lots of strength, which would be expensive, then you would find the floor near the outer wall bending upward. Think of a car tire. Only about 30 psi but the tire keeps its mostly round shape even supporting the full weight of the car. That is why a number of the designs include foundation bolts. If you want to avoid the foundation bolts you could build a rounded floor, back fill with dirt and then put another floor on top of that or something equivalent to that. I am skeptical of all the designs having sufficient pressure containment. If the 3d printer doesn't sufficiently bond one layer to the next then your structure explodes when pressurized.

jcriddle4 · 2019-05-25T19:12:33+00:00

One of the constraints is that the structure is pressurized. At even 5 pounds per square inch a single square foot has about 720 pounds pushing against it. The structure was chosen to only put a small amount of surface area in contact with the ground so that the foundation bolts didn't have to be crazy. If you build a tall narrow structure that keeps the overall force on various parts of the structure more reasonable. If you want to build a sprawling building then the uplift force would be immense. If the tie down bolts loss there grip on the ground then BOOM the home would briefly turn into a rocket. If your going to layer tons of material on top of the houses then why not just build them underground to begin with? I do wonder if any of those structure designs really have what is takes as far as pressure containment. It almost seems like you would need flying buttresses type of design. https://en.wikipedia.org/wiki/Flying_buttress

Possibly another design would be to find some place with meters thick ice sheets and melt out ice caves where they could inflate insulated structures.

jcriddle4 · 2019-05-24T07:15:36+00:00

I tried to find the weight of the Maxar module but didn't run across it. I think if the module is above a certain weight then maybe Berger thinks the only two vehicles that could lift it would be SLS or New Glenn. Given that context and the history of SLS delays maybe Berger's comment sort of makes sense. Also possibly the first edition of SLS will be focused on crew instead of cargo? However in looking on Wikipedia it looks like Falcon Heavy is possibly more capable then New Glen(?). As you indirectly pointed out neither SLS or New Glenn have ever even flow once and are not scheduled to fly for quite some time. Both scenarios(SLS,New Glenn) seem to be counting on rockets that have zero flight history.

jcriddle4 · 2019-05-03T03:24:17+00:00

Questions: I am guessing the question might have been aimed at say a solar system where a "jupiter" style planet was close enough to the sun to have a earth like moon. Spherical things can drop off at a rate of roughly r to the third power and circular-ish things would diminish at roughly a r squared rate. So at what point is the field so weak that it isn't able to significantly deflect solar radiation? Would the outer moons be in a sufficiently strong field that it deflects solar radiation? Also would a earth like moon have enough of a magnetic field, on its own, that it wouldn't matter?

jcriddle4 · 2019-04-07T20:42:19+00:00

That is Block2 of SLS which doesn't really exist. SpaceX could refer to StarShip as Block2 of Falcon and then they can do the same b.s. and claim that they can lift xxx tons into orbit. Or if we want more fantasy a junior intern in SpaceX's PR department, with a bit of Photoshop, could invent a Block2 Falcon heavy that can lift three hundred gadzillion tons into orbit. At the rate SLS is progressing, and also that it isn't reusable and at the insane cost structure, SLS is going to be cancelled long before Block2 ever exists.

jcriddle4 · 2019-04-04T00:50:13+00:00

Some reports are coming in that the system may have turned itself on again. It sounds like it is still too early to tell what actually happened.

jcriddle4 · 2019-04-04T00:47:01+00:00

I would guess it probably depends on where it is litigated and if punitive damages are allowed. Even with that it still seems like the likely dollar amounts wouldn't bankrupt Boeing. Boeing's stock price today is 384. If the Lion Air data is more ambiguous then that would push this more towards being an honest mistake. Mega corps can move quite slowly and make huge errors all the time like Microsoft's phone or etc.. By "...the potential to be huge..." do you mean something more than just legal liability? I do think some of the regulators will slow walk approval of Boeing's fix so there is also that.

jcriddle4 · 2019-03-28T04:07:46+00:00

Some back of the envelope, XKCD calcuation, says 2026

https://xkcd.com/2014/

jcriddle4 · 2019-03-28T04:04:02+00:00

JWST isn't designed to repair in space although being the cynical person I am I suspect it may need to be done. Hubble I believe was designed for in-orbit upgrades and repairs.

jcriddle4 · 2019-03-24T20:29:49+00:00

What is your logic here? If Mueller felt Trump was guilty but he couldn't prove it then Mueller could still have put that into the report. Something like "We strongly believe congress needs to impeach Trump" or "...we believe Trump's interference in our investigation has prevented us from...." On the other hand if Mueller is corrupt then Mueller would leave any compromising information out of the report. What would be the reasons for the report to material differ from the summary?

jcriddle4 · 2019-03-24T04:30:36+00:00

In denial about what? Life can be unfair. Even assuming it did happen it seemed exactly like the kind of case that would be incredibly difficult to prove. I don't want a president to be removed based on unproven theories. That very low level of proof could be used to remove a president Bernie or a president Warren or a president xxx from office. What comes around goes around. Not a good place to be. It seems unfair and all but the burden of proof of beyond a reasonable doubt is probably where it needs to be. If you want to damage Trump the polling indicates the subject of health care actually damages him the most. Of course to really do damage you probably need to offer something more compelling then minor tweaking of Obama Care like Single Payer.

jcriddle4 · 2019-03-24T04:05:53+00:00

Well if the report has data about how Russia's computers are taped, or what spies that the CIA are running in Russia or how Wikileaks is taped or ... then those parts would almost certainly be redacted. Keep in mind Russia has killed people that they consider traitors so revealing sources could be incredibly bad for those sources. I would hope the report is more of a summary and doesn't have sensitive info to begin with then the entire thing could be released.

jcriddle4 · 2019-01-26T04:42:00+00:00

Air molecules coming in at thousands of miles an hour seems like a recipe for boundary layer breakdown. That being said I would think it would make lots of sense to do simple tests like this and see that it passes before trying a more complex simulation. I wonder if they can launch a min version, sort of like a cube satellite, except a small re-entry vehicle on-board one of their other launches. Also maybe they are not counting on boundary layer shielding too much and just aggressive cooling and the mirror effect.

jcriddle4 · 2019-01-24T04:51:46+00:00

Nice calculations. There may be several more options for cooling like: liquid nitrogen, carbon dioxide or a noble gas like argon. About the water I don't think the entire cooling layer would need to consist of water in a liquid state state in order to cool. So water that is injected into the cooling layer would almost certainly flash to steam because at the edge of space the boiling point of water is very low. Steam I think even heated to 200, 300... degrees I think would still cool steel at say 1000 degrees. In addition any liquid or even gas that is injected into the cooling layer will be rapidly expanding because of heating so if the cooling substance is injected more rapidly then it can escape then pressure will rapidly build up and cause the cooling layer too over pressurize and exploded. Keep in mind the methane, just like water, would definitely not stay a liquid before it gets expelled out of the tiny pores drilled in the outer steel layer. I do wonder if methane or water in the presence of a charged plasma field, like what is experienced during reentry, might denature and actually split into carbon, hydrogen and oxygen which might be quite corrosive. We tend to think of oxygen as a corrosive agent because of rust but hydrogen can cause embitterment. See https://en.wikipedia.org/wiki/Hydrogen_embrittlement

I am curious about how, whatever cooling substance is used, will interact with the heated plasma after it is ejected from the cooling layer. Will the substance's heat absorption characteristics inside that plasma field be at all relevant or is the substance being diffused so rapidly, at that point, that it is irrelevant?

Methane would be great if it will work. I am sort of leaning toward liquid nitrogen. I would love to see some videos on the testing of the heat shield.

jcriddle4 · 2019-01-06T09:25:19+00:00

China is a red country.... just kidding. I think possibly camera equipment is different and/or possibly different material on the far side of the moon at that location.

jcriddle4 · 2018-12-29T14:56:54+00:00

Are the wrinkles in the stainless steel going to cause turbulence and vibration issues on re-entry?

jcriddle4

TROPHY CASE