kerbiloid Posted January 31, 2020 Share Posted January 31, 2020 (edited) 1 hour ago, nepphhh said: 50 km/s??? I highly doubt we have the technology to make anything survivable at an impact of that speed, no matter in how much ice you encase it. 50 0002 / (2 * 250 * 9.81) ~= 500 000 g The artillery shell electronics limit is ~15 000 g.https://en.wikipedia.org/wiki/Orders_of_magnitude_(acceleration) So, 30 times stronger electronics is needed. On the other hand, just twice as strong as the ultracentrifuge from the same table, which is still an electromechanical device rather than a piece of metal. P.S. 'Oamuamua is 200 m long and 35 m thick. It should just pierce is along or break in pieces. Probably they could just make a hole in a bigger one and let the probe fly through this hole gathering dust... Edited January 31, 2020 by kerbiloid Quote Link to comment Share on other sites More sharing options...
DDE Posted January 31, 2020 Share Posted January 31, 2020 Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted January 31, 2020 Share Posted January 31, 2020 8 hours ago, kerbiloid said: NPO Lavochkin proposed a space dart concept to penetrate interstellar objects trespassing our system. I’ma go out on a limb here and say maybe shooting darts at alien probes passing through our system might send them the wrong impression... ...or maybe the right one... Quote Link to comment Share on other sites More sharing options...
sh1pman Posted January 31, 2020 Share Posted January 31, 2020 (edited) 2 hours ago, CatastrophicFailure said: I’ma go out on a limb here and say maybe shooting darts at alien probes passing through our system might send them the wrong impression... ...or maybe the right one... Definitely the right one. “This here is our system, we welcome unannounced guests with 50 km/s penetrator darts, have a nice day”. Edited January 31, 2020 by sh1pman Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 1, 2020 Share Posted February 1, 2020 (edited) The Vorlons first shot then asked didn't ask. https://babylon5.fandom.com/wiki/Vorlon_Homeworld Quote Expeditions were sent to the planet following the Vorlons' departure, none of which survived. Lyta Alexander has said that the Vorlon homeworld was "off limits" until the younger races were ready for the technology left on the planet. So, this looks like the right way. Upd, Spoiler Edited February 1, 2020 by kerbiloid Quote Link to comment Share on other sites More sharing options...
tater Posted February 3, 2020 Author Share Posted February 3, 2020 Quote Link to comment Share on other sites More sharing options...
sh1pman Posted February 4, 2020 Share Posted February 4, 2020 (edited) Quote Everything You Need To Know About Russia’s (Possibly Fictional) Super Heavy Rocket By Anatoly Zak https://www.popularmechanics.com/space/rockets/a30705512/yenisei-rocket-russia/ Thoughts: Quote But the problem with the Energia three decades later is that its components were simply too big to transport in a country much smaller and much less affluent than the Soviet Union. ... But today, without that costly option, Roscosmos engineers need to fit all major components onto rail cars, which could then pass through the narrow tunnels and treacherous zigzags of the Trans-Siberian railroad. By abandoning the use of risky hydrogen fuel on the core stage and opting for the less-efficient-but-more-condensed kerosene fuel instead, engineers could "slice" the rocket into a cluster of seven boosters, each of them small enough to fit onto a rail car. Why can't they just build a hydrogen stage factory at Vostochny? Better rocket + jobs for Far East + pride for reviving Energia. Or have I been spoiled by SpaceX approach to building Starship and launching it from the same place? Edited February 4, 2020 by sh1pman Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted February 4, 2020 Share Posted February 4, 2020 8 hours ago, sh1pman said: Why can't they just build a hydrogen stage factory at Vostochny? Better rocket + jobs for Far East + pride for reviving Energia. Or have I been spoiled by SpaceX approach to building Starship and launching it from the same place? Edited 5 hours ago by sh1pman I dunno, man, I seriously want to see that great Kerbal monstrosity fly for real. Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted February 4, 2020 Share Posted February 4, 2020 9 hours ago, sh1pman said: Quote Everything You Need To Know About Russia’s (Possibly Fictional) Super Heavy Rocket By Anatoly Zak https://www.popularmechanics.com/space/rockets/a30705512/yenisei-rocket-russia/ Mmmmmm, asparagus...... *Homerdroolface* Quote Link to comment Share on other sites More sharing options...
sh1pman Posted February 4, 2020 Share Posted February 4, 2020 2 hours ago, CatastrophicFailure said: I dunno, man, I seriously want to see that great Kerbal monstrosity fly for real. Same, but it would be 10 times more badass if they had chosen Energia-style hydrolox first stage instead of kerolox. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 4, 2020 Share Posted February 4, 2020 1 hour ago, sh1pman said: Energia-style hydrolox first stage instead of kerolox. Energia 1st stage was kerolox. It's 2nd stage (central core) with hydrolox. Quote Link to comment Share on other sites More sharing options...
DDE Posted February 5, 2020 Share Posted February 5, 2020 The Gagarin centre is forced to consider relaxing cosmonaut requirements because everyone has gadget-induced nearsightedness these days. A standup comedian snarks that juvenile criminal records and minor psychiatric disorders will be tolerate next. Rogozin takes snipes at him across multiple media. https://iz.ru/972406/2020-02-05/rogozin-otvetil-na-shutku-urganta-o-smiagchenii-trebovanii-k-kosmonavtam This is the space program we deserve. Quote Link to comment Share on other sites More sharing options...
sh1pman Posted February 5, 2020 Share Posted February 5, 2020 10 hours ago, kerbiloid said: Energia 1st stage was kerolox. It's 2nd stage (central core) with hydrolox. I wrote “Energia-style first stage”, and it referred to the new super heavy rocket, not Energia. Yenisei first stage (central core) = Energia second stage, Yenisei boosters = Energia first stages. Quote Link to comment Share on other sites More sharing options...
RCgothic Posted February 5, 2020 Share Posted February 5, 2020 Hydrolox is daft as a first stage anyway. Too low-thrust when the rocket is heaviest. Unnecessarily bulky for assembly, transport and pad infrastructure. Unnecessarily high cross-section for when the rocket is transiting the densest atmosphere. Quote Link to comment Share on other sites More sharing options...
DDE Posted February 5, 2020 Share Posted February 5, 2020 3 minutes ago, RCgothic said: Hydrolox is daft as a first stage anyway. Too low-thrust when the rocket is heaviest. Unnecessarily bulky for assembly, transport and pad infrastructure. Unnecessarily high cross-section for when the rocket is transiting the densest atmosphere. Well, it's not daft if it's LANTR... Quote Link to comment Share on other sites More sharing options...
sh1pman Posted February 5, 2020 Share Posted February 5, 2020 6 minutes ago, RCgothic said: Too low-thrust when the rocket is heaviest. That’s why there’s 6 kerolox boosters. 7 minutes ago, RCgothic said: Unnecessarily bulky for assembly, transport and pad infrastructure. That’s why it’s better to build hydrolox stages near the launch site. 7 minutes ago, RCgothic said: Unnecessarily high cross-section for when the rocket is transiting the densest atmosphere. Maybe. But losses due to atmospheric drag are very low anyway, compared to gravity losses. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 5, 2020 Share Posted February 5, 2020 (edited) 1 hour ago, RCgothic said: Hydrolox is daft as a first stage anyway. Too low-thrust when the rocket is heaviest. Unnecessarily bulky for assembly, transport and pad infrastructure. Unnecessarily high cross-section for when the rocket is transiting the densest atmosphere. But instead they can ignite all engines on ground, partially increase total ISP during the ascent, vary the number of side boosters instead of throttling. Spoiler And use wooden T-sticks to ignite them. So, like the Shuttle recommended. At 10 km the air density is anyway ~3 times lower, so ISP grows, and compared to the total burn time (~10 min or so), it's just several percent of duration with ISP 2/3 of maximum. Edited February 5, 2020 by kerbiloid Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 7, 2020 Share Posted February 7, 2020 According to the US satellite monitoring resources, the American recon sat USA-245 took evasive action on approaching of the Russian inspector sat Kosmos-2543. It was estimated that Kosmos-2543 should be passing next to the USA-245 on 2020.02.(07..10). After maneuver, the closest approach was performed on 2020.01.(20..21) (If I got it right, 150..300 km of distance). Then K-2543 tried to synchronize its orbit with USA-245. *** In Novermber 2019 another a bigger sat Kosmos-2542 was placed on orbit. The Russian MoD declared that it's a mothership for orbital inspection and monitoring, After launch, it separated a smaller sat, this K-2543. The official purpose of the K-2543 is monitoring of other domestic sats. https://translate.google.com/translate?hl=ru&sl=ru&tl=en&u=https://www.interfax.ru/russia/694389 Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 19, 2020 Share Posted February 19, 2020 (edited) Two Russian crewmembers for the April launch are replaced with the backup crew for medical reasons. https://translate.google.com/translate?hl=ru&sl=ru&tl=en&u=https://www.rbc.ru/technology_and_media/19/02/2020/5e4d528b9a79475707dee0a6 Upd. One of them has some long-term medical thing, so both are replaced due to this by Ivanishin & Vagner. Edited February 19, 2020 by kerbiloid Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 21, 2020 Share Posted February 21, 2020 The Sea Launch platform is on its way to the shipyard in Slavyanka. The travel will take about three weeks, then it will stay there for a year. https://translate.google.com/translate?hl=ru&sl=ru&tl=en&u=https://www.interfax.ru/russia/696206 Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 22, 2020 Share Posted February 22, 2020 Siberia Airlines (a part of S7 group) has registered a 100% subsidiary "Sea Launch Space Center LLC" in Slavyanka, with 1 mln RUR of capital. https://translate.google.com/translate?hl=ru&sl=ru&tl=en&u=https://www.interfax.ru/russia/696358 Quote Link to comment Share on other sites More sharing options...
Scotius Posted February 22, 2020 Share Posted February 22, 2020 That's... not a lot of money for a high tech, space related company operating a sizeable asset. Quote Link to comment Share on other sites More sharing options...
DDE Posted February 22, 2020 Share Posted February 22, 2020 2 hours ago, Scotius said: That's... not a lot of money for a high tech, space related company operating a sizeable asset. That's exactly a hundred times the legally mandated minimum for an LLC, though ) Quote Link to comment Share on other sites More sharing options...
Scotius Posted February 22, 2020 Share Posted February 22, 2020 So, it's just a shell. Legal, placeholder entity with very little substance inside? Eh Quote Link to comment Share on other sites More sharing options...
DDE Posted February 26, 2020 Share Posted February 26, 2020 Quote Link to comment Share on other sites More sharing options...
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