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Everything posted by kerbiloid
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Project Orion: A discussion of Science and Science Fiction
kerbiloid replied to Spacescifi's topic in Science & Spaceflight
A magnetic "nozzle" (which is actually a chamber) would not work in atmosphere because it's a quasispherical grid of conductors, to minimize its irradiated area. So, everything fusing/being fused inside would be blown away by wind before the nozzle. And that's exactly what gives to the Orion scheme its advantage. It doesn't surround the reaction zone with something heatable or destroyable. It has released the energy far behind, but then focused on its enforced reflector (the pusher plate). So, it doesn't need to care about the pressure and temperature, but can't work in atmosphere, too, just for other reasons. It its turn, the magnetic nozzle scheme is limited by its material nature, and can't produce high thrust, because high thrust provided by light particles and cores requires a lot of energy due to high energy-to-momentum ratio. This will cause significant heating of surrounding structures (the magnetic nozzle), what makes to make it a grid of flat trusses, but any grid size is limited mechanically by the strength of materials. So, non-Orion schemes are low-thrust (unless they heat some heavy-atom substance on atmospheric flight, which turns them into a low-ISP rocket). That's why there is no visible alternatives to the Orion-like design based on the known physical principles. Just the classic, mechanical Orion scheme is obsolete (though probably workable), and MiniMag Orion with Z-pinch fusion and magnetic reflector instead of the pusher plate is appropriate for high-thrust and high ISP, but also not for atmospheric flights. -
The Kerbals are a race of green, short, pop-eyed, funny, and expendable fictional creatures living in a fictional world. Why are their ears not pointy?
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I see. Without money who could bt a six-seat capsule for a billion. Still no OS, alas.
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https://www.grammarphobia.com/blog/2011/04/double-u.html
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In Hollywood movies cops always eat dough toruses. Doughnutorus
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Why not? A new release is always better.
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Banned for blaming the alphabet.
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Granted. You bought a paper cutter and started applying it to the brushes. I wish ffor a small personal universe.
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Ask a stupid question, Get a stupid answer back.
kerbiloid replied to ThatKerbal's topic in Forum Games!
Because they are in the simplex mode, not in the duplex one, they dictate. Listeners are to listen. Will SQLite outlast the humanity? -
Back in my days there was snow in winter.
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One sentence you could say to annoy an entire fan base?
kerbiloid replied to Fr8monkey's topic in Forum Games!
Toys are a cheap surrogate of a serf theater. -
Vacuum is a cheating itself.
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Leland Gaunt comes into the towm. Gaunt Hill
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Jeb was a playwright and saw the things existing only in his brain. Nobody believes him.
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Project Orion: A discussion of Science and Science Fiction
kerbiloid replied to Spacescifi's topic in Science & Spaceflight
I don’t know about a fusion explosion but the ITER central solenoid apparently produces a 13 Tesla field According to https://physics.stackexchange.com/questions/269410/what-is-the-relationship-between-the-magnetic-units-oersted-and-tesla As I had read in childhood, 500 kOe field slows the blood speed by two times, 2 MOe field stops it. So, >50..200 T is a lethal range. -
I mean the Bigelow-style hype several years ago. ROSS is not an inhabited station plan. It's a visitable station project. Yes, NASA plans are such ones. Previously: modules for somebody else station or shuttle. And no, unlikely they will. Especially now. *** Looks like there is no reasonable project of orbital station at all anywhere. (China will probably finish its half-Mir, but mostly for XP and level up.) So, ISS has non-zero chances to become the first orbital craft with fusion powerplant.
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Iirc, to the date the only expandable module is the shed of the Russian ISS segment. Looks, like in KSP the expandability works better.
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He performed a double-suborbital jump and splashed in the middle of the sea. His wife hit him with a pan for being late to their anniversary celebration dinner. Doomer Kerman found a death note.
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Mars is just 0.107 of the Earth mass. Who needs this loser? Belt: 2.8 AU Earth: 1 AU. Mars: 1.5 AU min(Mars-Belt) = 2.8-1.5 AU = 1.3 AU, 0.107/1.32 ~= 0.063 max(Earth-Belt) = 2.8+1 AU = 3.8 AU, 1/3.82 ~= 0.069 So, the Earth affects the belteroids stronger than Mars even when Mars is at the closest distance, while the Earth is at the fartherst one.
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D1 = D2 Scylinder
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ABCDFEGHIJKLMNOPQRSTUVWXYZ
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The last thing he had read was: "One cring to rule them all, one cring to find them, One cring to bring them all and in the darkness bind them. The One Great Cring!!!" Quasi-modder Kerman has rung the cathedral bell.
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