RCgothic
-
Posts
2,872 -
Joined
-
Last visited
Content Type
Profiles
Forums
Developer Articles
KSP2 Release Notes
Bug Reports
Posts posted by RCgothic
-
-
Tanks are loading. Methane tank is frostier than I was expecting.
-
Even if unsuccessful! >.<
-
Today's Starlink was the heaviest ever:
-
It actually looks really small. My sense of perspective had been getting warped I guess!
-
Correct, the gain in potentially energy would need to be paid for somehow.
Most likely it would be as difficult to step through that wormhole as to climb the VAB in a few steps.
-
11 hours ago, Deddly said:
Ah yes, the beauty of the imperial system, where the US pint does not match the UK pint (just one example).
Sigh. I want to burn this whole system with fire.
-
5 hours ago, Codraroll said:
That's just language. The half-liter is as ingrained in the language over here as the pint is in the UK. And I doubt it would cause that much critical confusion if the word "pint" became established short-hand for half a liter. Few people would complain about getting 3 cl more beer than they asked for.
A pint is strictly 568ml, but even in the UK you get a large number of bottles/pint glasses sold as "ISO Standard Pints" (AKA 500ml), and pretty much nobody complains about the missing 68ml.
-
42 digits calculates the circumference of the observable universe from it's diameter to a calculation precision of about a proton's width.
This is especially hilarious because the *first* digit of the diameter of the observable universe isn't precisely known, so there's no conceivable reason to calculate the circumference to its 42nd digit. Garbage in, garbage out.
NASA/JPL use 15 digits for their most precise navigational calcs.
-
A tonne of antimatter divided a billion ways could power a billion candle-like heat outputs (80W) for around two billion seconds (~ 64 years).
But it would be far more likely to deliver a billion instantaneous explosions each equal to about 40kg of TNT, or approximately 4 Javelin anti-tank missiles per person.
There's no kill like overkill.
-
I can't conceive any system that could safely contain a ton of antimatter on earth. Even a perfectly functional system would be a time bomb with a destructive energy in excess of 40 gigatons. The level of destruction from an accident would be continental in scale.
Plus in order to be magnetically containable it would need to be an antimatter *plasma*, and even the best confinement techniques we have for matter plasma leak. And if antimatter and matter come into contact they'll dump all their energy into the confinement system, which then rapidly disassembles.
Any anti-matter using civilisation would surely ban its planetary use.
-
The new LEO earth observation constellations will soon mean there isn't any part of earth that isn't under continuous observation in clear sky conditions.
-
Starlink is LOS so basically unjammable and hard to detect compared to conventional phone signals. That's why it's prized by front line units that operate cell phone discipline.
Some militaries are disciplined enough to understand that using cell-phones paints their location for strikes. Those that aren't get defeated in their objectives.
-
On 12/9/2022 at 1:05 AM, Spacescifi said:
How well blood would be with a nuclear reactor I don't know.
Hard to overstate how BAD for a reactor - any conceivable reactor - this would be.
Reactors need cooling and protection from oxidising environments. Oxygen-carrying proteins don't like high temperatures or high radiation environments. The blood proteins would immediately denature and become useless, defeating the purpose of using blood in the first place. So it'd be useless at best.
Blood also contains lots of things that would stick to or oxidise fuel, degrading the fuel performance. Not the least of these being oxygen. These impurities would also get highly activated by the neutron flux and the blood coolant would become extremely radioactive, and make maintenance and access to machinery extremely problematic.
This is a very bad idea.
-
-
After the detonation event, the raptor vents were flex-hosed to the launch mount through the open aerocover panels. Both booster and launch mount need modifications for an alternative routing for launch, and then the booster needs its aerocovers reinstalling.
I wouldn't write B7 off yet.
-
Expected 20s, more like 12-14s. Early shutdown? Also number of engines unknown at present, awaiting confirmation.
A full tank would only need low autogenous pressurisation, so wouldn't need that many engines.
-
13 minutes ago, SunlitZelkova said:
晴天になりますように or いい天気になりますように
晴天になりますように (seitenninarimasuyouni)
いい天気になりますように (iitenkininarimasuyouni)
For those who can't read kanji/kana.
-
5 hours ago, tater said:
There's no abort fast enough, they'll at best have maybe an hour's warning.
Shielding consists of a vest they can wear, and hiding back in Orion with supplies piled on the floor—presumably they rotate Gateway for optimal protection.
It'd not be like "zap, you're dead" either. Even if completely unexpected, elevated radiation levels are tolerable for *short* periods. Drop everything and bunker down immediately and the astronauts would still have a decent chance.
-
3 hours ago, Spacescifi said:
So Tantooine is either pure fiction or a world that was terraformed.
Knowing star wars I would not be surprised is if it was barren world with no atmosphere and they just terraformed it so that it did.
Tatooine was a verdant world laid waste by the Infinite Empire of the Rakata around 25200 BBY.
-
I'll believe Carl Sagan is happening when they fully fund it. Given they didn't even do LUVIOR properly, I remain skeptical.
-
-
It don't read it quite that cynically. It's more "Our services are popular, so DoD should get in early to make sure there's availability before everything is going up commercially."
Where it's a bit of a fib is that there isn't a global shortage of launch services. SpaceX have basically shown they can service any foreseeable number of commercial launches with Falcon 9 (albeit they may have to cut down on Starlink a bit).
And the idea of SpaceX having a launch scarcity when Starship comes online is laughable.
Just because everyone other than SpaceX is having a hard time keeping up doesn't mean there's a launch supply shortage.
-
The exhaust colour depends on the combustion products and their temperature. Hot carbon glows very yellow. SRBs usually use a carbon polymer binder for conditioning the propellant, so that tends to be the dominant colour in most SRBs.
I suspect SRBs just don't burn hot enough usually to get into the white-blue part of the spectrum. Hotter requires more specific energy, which is difficult between solid propellants with a binder, and also more pressure which leads to heavy casings that detract more than they contribute.
Blue SRBs do exist, but they tend to have had something added to the propellant that doesn't really contribute anything except the colour:
Also movies work on rule of cool. Those are scifi missiles that can be any colour the director thinks cinema audiences will most appreciate.
-
SpaceX Discussion Thread
in Science & Spaceflight
Posted · Edited by RCgothic
Engine chill vent exhaust manifold is frosty!