Shpaget
-
Posts
1,991 -
Joined
-
Last visited
Content Type
Profiles
Forums
Developer Articles
KSP2 Release Notes
Posts posted by Shpaget
-
-
According to Wikipedia article on Alcubierre drive:
QuoteIf certain quantum inequalities conjectured by Ford and Roman hold,[26] the energy requirements for some warp drives may be unfeasibly large as well as negative. For example, the energy equivalent of −1064 kg might be required[27] to transport a small spaceship across the Milky Way—an amount orders of magnitude greater than the estimated mass of the observable universe. Counterarguments to these apparent problems have also been offered,[3] although the energy requirements still generally require a Type III civilization on the Kardashev scale.[8]
So, even with the 99% efficient solar panels (max theoretical efficiency is not that high), your Moon sized solar panel is still about one entire galaxy of energy output short of providing enough energy for one ship.
-
When dealing with fission, neutron management is the name of the game. This is achieved by usage of different materials to absorb, reflect, moderate, propagate etc. the neutron to achieve the desired effect. Also, geometry is a big factor so by properly designing the reactor, and supplying the correct amount of fission fuel, in the correct geometry with correct combination of support materials you can achieve the desired result.
In case of NSWR, this specific combination is achieved only for a relatively small amount of fuel/propellant in a specific part of the engine that is designed to withstand these energies.
-
4 hours ago, Spacescifi said:
Steel is about 1 Newton per square meter compared to spider silk which about 5 newtons per square meter.
You're a few orders of magnitude off.
-
The system where the planet Krikkit is is surrounded by a dust cloud, blocking the view of the Universe. Eventually, the locals figured out spaceflight, found the rest of the Universe and decided that it would have to go.
In any case, making general assumptions based on sample size of 1 is not sensible.
-
For some context, Saturn V and Starship are about 3000 tons. The Nimitz aircraft carrier has two reactors clocking in at about 630 tons each.
Securing a 30 ton object is a problem we've solved a long ago.
-
Why is that a problem? Propulsion system attached directly to the core, in line with propulsion vector. The rest of the ship is built around it, everything is attached to the core, add a bit of cosmetic plating so the core is not "outside".
-
47 minutes ago, Spacescifi said:
Too heavy and the ship's floors won't able to support it under thrust as it would fall through and tear through the ship's rear as it accelerates.
You have a society capable of making magical drives, but worry about their ability to soundly engineer the floors?
Just don't have your core sitting on the floor, but rather the floor sitting on your core. Problem solved.
-
4 hours ago, Spacescifi said:
What if I just go with timeporters that can only go forward in time then?
4 hours ago, Spacescifi said:Like figuring out your ship was either destroyed in the future or it's timeporter disabled when it ceases to timeport test objects past a certain date.
If you know now that the ship didn't (will not) arrive to the future, you still have backwards time travel of information, which is exactly the same thing as the problem you're avoiding.
-
Makes you wonder about the point of classifying orbital parameters.
If Tomppa can go to their garden and take multiple pictures of you super secret spaceplane, then post the info for all the world to see, imagine the capabilities of those you are actually hiding the info from.
-
While the end of its life is a loss for scientific comunity, and humanity as awhole, we should keep in mind that the original primary mission was supposed to last only five years. We got 40 years of extra science out of it.
In addition to this malfunction, the RTG is also at its last useful decays and very soon will no longer be able to produce enough power to sustain the probe anyway.
We should not mourn the loss, but celebrate its life and achievements.
Congratulations to the entire team that was involved in design, manufacture and operating it over the decades.
-
The first group of Alaska Airlines 737s return to service. They expect to finish all the inspections by the end of the week.
https://news.alaskaair.com/alaska-airlines/operations/as-1282/
-
Update on this front!
Sierra Space performed a full scale burst test of their inflatable habitat. They achieved 77 psi (5,3 bar), or 27% above NASA's recommended level of 60,8 psi before the module burst, so they are happy with that.
The habitat called LIFE 1.0 (Large Integrated Flexible Environment) is cylinder 9 m in diameter, 6 m tall. With the volume of 285 m^3 it is about one third of the volume of ISS.
oops, I now realize there is a Sierra Nevada thread, which is actually the parent company of Sierra Space (I always thought those were two separate entities).
-
From FAA
QuoteAs an added layer of safety, the Federal Aviation Administration (FAA) is recommending that operators of Boeing 737-900ER aircraft visually inspect mid-exit door plugs to ensure the door is properly secured. The Boeing 737-900ER is not part of the newer MAX fleet but has the same door plug design.
No words on whether anybody found anything on ERs.
-
13 hours ago, Arugela said:
pi*pi = 9.86960440108935861883
4*pi = 12.56637061435917295385
12.56637061435917295385/9.86960440108935861883 = 1.27323954473516268615
1.27323954473516268615*pi = 4
Does this surprise you? Were you expecting something else? Are you confusing yourself by writing out all those decimals?
This is equivalent to (4*(pi^2))/(pi^2). Square pies cancel out and you are left with 4.
13 hours ago, Arugela said:Should pi be looked at as a 2 dimensional value?
I wouldn't.
-
Leg extension was a bit out of sync.
Another good launch.
-
21 minutes ago, mikegarrison said:
snip
Like I said, my stand is not focused just on aerospace but on general concept of self control, including other industries like food production, animal husbandry, utilities etc...
One of the regulations over here is that food manufacturers (among others), are allowed to control themselves, with government inspectors taking a back seat. If the manufacturer finds irregularities, they are required to report it to the gov inspectors and then conduct self controls more often for some time. These are not only a burden but may lead to recalls and drop in public approval of whatever the product, resulting in loss of profits for the company. That means that the manufacturer is continuously in conflict of interest and there is always at leas some incentive to neglect the reporting of issues, just kind of fix it and hope the public never finds out.
Just because an inspector is not an employee of a company they are inspecting, doesn't mean they are less competent than the in house personnel.
-
More from FAA
https://www.faa.gov/newsroom/faa-increasing-oversight-boeing-production-and-manufacturing
QuoteFederal Aviation Administration (FAA) today announced new and significant actions to immediately increase its oversight of Boeing production and manufacturing. [...]
The actions announced today include the FAA conducting:
- An audit involving the Boeing 737-9 MAX production line and its suppliers to evaluate Boeing’s compliance with its approved quality procedures. The results of the FAA’s audit analysis will determine whether additional audits are necessary.
- Increased monitoring of Boeing 737-9 MAX in-service events.
- Assessment of safety risks around delegated authority and quality oversight, and examination of options to move these functions under independent, third-party entities.
Hopefully this will lead to the abolishment of the practice of governments delegating health and safety oversight to the companies themselves. This is not a problem with just Boeing, or just aviation, nor is it endemic to USA. It's a widespread issue globally, that I find beyond absurd.
One can hope.
-
10 minutes ago, tater said:
maybe a cut and paste that keeps formatting
Most likely that. When you paste something, for me at least, there's a popup at the bottom of the text box that says "Pasted as rich text. Paste as plain text instead". The second half is clickable and removes formatting that rich text contains.
-
32 minutes ago, darthgently said:
It would be interesting to find out that all the bad installs came down to one botched torque wrench at a common shop or one rookie mechanic at that shop with arms like an ape and who goes through torque wrenches like popcorn
I have no trouble imagining that. It appears to be a lot harder to get some guys to understand that a click of the torque wrench means "stop pulling" than I would have thought a few years ago. The usual excuse when asked "Did you not hear and feel the click?" is "Yeah, but I though I'd tighten it just a little bit more."
I have three collet nuts (ER16, that's M22 nut) sitting on my desk that are split completely on one side by overtightening them. What is worse is, I found them by chance. They were being actively used in the milling machines. No one knows who did it, no one noticed they broke.
-
47 minutes ago, Nuke said:
wait, there's dark mode, you mean ive been searing my retina for nothing?
The very bottom of the forums.
It's quite fugly and looks unfinished, but at least it's dark.
-
13 hours ago, PakledHostage said:
Seems United has found problems with some of the plugs on their aircraft:
Alaska Airlines reports that they too have found "some loose hardware".
https://news.alaskaair.com/alaska-airlines/operations/as-1282/
QuoteAs our maintenance technicians began preparing our 737-9 MAX fleet for inspections, they accessed the area in question. Initial reports from our technicians indicate some loose hardware was visible on some aircraft.
NTSB says the plug moved upwards and disengaged all twelve stops of the holding mechanism. The four bolts that were supposed to hold the door down have not been recovered yet and NTSB has "not yet determined if they existed there". That will be determined in their lab in Washington DC.
https://www.youtube.com/watch?v=DI8tv9h0PPg
timestamp 2:50
-
FAA has already proposed rule change to increase CVR from 2 to 25 hours. That is likely to happen soon, however, the regulation would apply only to newly manufactured planes.
NTSB lady was saying that the new rule should apply to all planes.
https://www.faa.gov/newsroom/faa-proposes-requiring-25-hour-cockpit-voice-recorders
EASA and ICAO have had this rule for years, so devices are in actual use. There is no development issue. It is literally an off the shelf part at this point.
-
Apparently, the cockpit voice recorder was completely overwritten. For whatever (regulatory) reason, it keeps only 2 hours of recording.
https://www.youtube.com/watch?v=nsxttZvI3qo
-
Bob, a schoolteacher in Portland, found the door plug in his back yard.
edit: sniped
holographic 2D monitor for viewing angles?
in Science & Spaceflight
Posted
IPS matrix LCDs have almost 180 ° viewing angle. Is that not enough?