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Everything posted by kerbiloid
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"Bingo!" "The binary finary file code execution is started!"
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Granted, but only water jet ski-ing. I wish for Kerbal water skating.
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Floor 3066: Broken Kraken
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The thread is banned to prevent that.
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The Star Trek Method.... Versus A Nuke
kerbiloid replied to Spacescifi's topic in Science & Spaceflight
Any way to do that without shrinking the wall several times in a supermighty magnetic field? It will be melted by the applied protective force, comparable to the nuclear force it withstands. After a 500 t of AM blast there would be not much air above that country. Who at all let that ship to land approach to the Earth inner regions of the Solar System?! *** 500 t of AM (+500 t of M) = 9*1022 J. So, to produce 500 t of AM, they have to spend ~1023 J. That's a weekly solar energy falling to the Earth. Or 300 000 + t of deuterium. That's HOW MUCH the AM is ineffective. -
Project Orion: A discussion of Science and Science Fiction
kerbiloid replied to Spacescifi's topic in Science & Spaceflight
1. It were Teller's words in 1962, after the Dominic tests, that it would be posible to improve from 5+ to 11 Mt/t, and make a 50 Mt bomb of standard 4.5 t mass. But it would require a spherical geometry and ablative compression instead of the T-U scheme, as more effective. Thus, the bomb would not fit the standard bomb bay geometry (8 ft wide) and would be impractical. The T-U scheme was then anyway scrapped in favor of quasi-spherical secondaries of sub-megaton range (like the W88's Cursa and its W76 ancestor), preferred by the Soviets from the very beginning for the technical economy reasons. 2. The deuterium is cryogenic, while the gigaton charges like Sundial, Gnomon, and two others, were to be on duty, either behind the Moon, or ready to start. So, it needs a massive cryostat. And the liquid deuterium density is just 200 kg/m3, while LiD is 820 and doesn't need a cryostat. Thus, while the pure-D was studied for the gigaton, it would be as of no use, as other liquid deuterium designs. 3. Any fusion fuel is not just heated by the primary nuke, it's compressed by its massive metal hull which is heat by the heavy-atomic (thus, U or Pb) outer casing. So, any fusion bomb efficiency would be far from the ideal 80 Mt / t of pure D-T. *** As even 11 Mt/t was never achieved irl, this makes to think that the ideal 200 t would be irl several times heavier, i.e. ~1000 t. -
Project Orion: A discussion of Science and Science Fiction
kerbiloid replied to Spacescifi's topic in Science & Spaceflight
With the reached yield-to-mass ratio ~5.5 Mt/t the planned Doomsday Orion with 10 Gt SUNDIAL warhead would be weighting about 2 000 t. (With the planned 11 Mt/t - twice lighter). Anyway, its launch mass was iirc ~4 800 t, say 5 000 t. The pusher plate diameter ~23 m. Space Shuttle launch mass was ~2 000 t, including ~800 kg of orbiter and orange tank. So, to lift the Doomsday Orion to the thin air you need ~12 SRB of Space Shuttle. Not that much. After separation, the Orion should use its own nuka-engine to reach LEO. It average T/W should be ~1, like any upper stage provides. Coincidentally, it's also the human normal gravity, but this doesn't play a role. The required delta-V is the same, ~6 km/s. Thus, the burn will take same 600 s of time, like any rocket needs. The pulse rate is about 2 nukes per second, 2 Hz. Thus, you need 1 200 nukes to reach LEO. And the same amount (but of lower yield) you need for a smaller Orion. Say, the 100 t & 10m "Saturn V Military Orion", using Saturn V first stage instead of SRB. You need ~5 000 t * (6 000 m/s)2 / 2 ~= 9*1013 J ~= 2 kt of kinetic energy. They were able to focus ~6% of the yield energy in desired direction. That's the last open info. Obviously, they couldn't focus 50% from the rear hemisphere. So, let's take that they can focus ~10% of energy. So, you need 200 kt of total gross yield. Adding gravity, drag, plate heating, and other losses, let's take it by an order of magnitude greater. ~2 000 kt. So, you need ~1 200 nukes of 1..2 kt yield to put the Doomsday Orion to LEO. According to the open Western data, such yield is provided by a DT-boosted charge with ~3..4 kg of fissile materials (235U pusher and 239Pu sparkplug). The 100 t / 10 m Military Orion is by ~50 times lighter. It requires ~1 200 charges of several tens tons yield. The known US uranium deuteride tests of mid-1950s (Ruth and Ray) have reached ~200 t of yield with no plutonium. It's said that it can be used as a sparkplug instead of Pu. So, both Orions need the same DT-boosted fission charge of two-point initiation scheme with 3..4 kg of uranium (no plutonium). The single-point detonation provides ~0.1 kt yield for 10 m Orion, the full detonation provides 1..2 kt for the 23 m Orion. So, in total you need just 5 t of oralloy for any reasonable Orion. 5 t (i.e. 6 km/s) more to send it to Mars or deliver to the Moon L2. Same to return back. So, you need just 15..20 t of oralloy per flight. It's normal for relatively rare usage. *** If case of crash, 20 t of U won't add any significant radioactivity to nature. -
SETI-related discussion, split from another thread.
kerbiloid replied to mikegarrison's topic in Science & Spaceflight
The first really domesticated species. They just can't live without humans. Literally. -
Clockwork Orange
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Banned by Betelgeuse (when it was a star)
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Floor 3064: Hagen dies, but Götterdämmerung is going on.
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Floor 3062: An ambulance post to prevent the models from dying on casting after eating the ammonia ice cream out of interplanetary ice.
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Banned for aligning the stars.
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Banned because Windows Me has been banned long ago.
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Quite opposite to no.
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Granted. Teh Monsters of S(ing)2 are available on eBay. I wish Falcons were splashing on water ski.
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Wardenclyffe Tower
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It's a noname Kerbal, representing any Kerbal in the world. It's actually green, standing against the white wall, but it's situated so close to the Sun (or to the Orion engine), that green Kerbal seems white to you, while the white wall seems black compared to him.
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Floor 3059: A Diebold ATM for the Die cast shop.
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Banned by fissile materials.
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Are they at 3 cm above water? They should build a half-meter sand wall to protect it, and turn into a "paddling pool" (aka "лягушатник" / "frog place"). Why not, the Dutch have made whole provinces this way.
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Project Orion: A discussion of Science and Science Fiction
kerbiloid replied to Spacescifi's topic in Science & Spaceflight
It's not a rocket. Or it is but very (in/per)verted, if treat the nuke as a single-pulse rocket engine shooting at the jet reflector direction. Though, the same does any turbojet in reverse mode.