wumpus Posted June 28, 2020 Share Posted June 28, 2020 1 hour ago, DDE said: Well, they did try. Zarya was basically a Dragon but with 24 kerosene-peroxide thrusters. Which makes the Roscosmos guys even saltier. Actual quote: Was liquid hydrogen *that* hard to work with that Glushko preferred his exotic hypergolics, or was he only interested in missile engines and demanded a high shelf life for all his fuels? Hydrolox typically beats all but nukes on that list. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted June 29, 2020 Share Posted June 29, 2020 (edited) According to the published Khrunichev's Center docs (nested link), Angara costs 7 bln RUR (90..95 mln USD), three times more expensive than Proton. which costs 2.33 bln RUR (30+ mln USD). It's planned that by 2024 it will cost 4 bln RUR (50..55 mln USD). https://translate.google.com/translate?hl=ru&sl=ru&tl=en&u=https://www.rbc.ru/technology_and_media/29/06/2020/5ef934f69a7947d71570b6ac 10 hours ago, wumpus said: that Glushko preferred his exotic hypergolics Exotic was cryogenics. Everywhere in the world ballistic missiles were hypergolics (except Atlas, early Titan, and Korolev's ones), as well as most of the used space rockets, derived from them. R-36 and UR-500 were ICBM, R-56 was derived from ICBM by the main ICBM developer. In the upper stages the storable hypergolics allowed to reach the high orbit, launching simple engines several times every next hours. And delay the launches as many times as you need. Pentaborane and beryllium hydride were more efficient than liquid hydrogen, and not cryognic, so compact and storable. ICBM-derived launch vehicles were having highly automated storage+railway+launchpad sites, which allowed to launch the prepared and fueled space rockets one-by-one in case of war, with minimal crew. Both MOL and Almaz, as well as DynaSoar and Spiral were designed to be quicklaunched and start performing a combat recon mission right after reaching the orbit, so again hypergolics were the best choice. (Though, Spiral originally would be using fluorine-based oxidizer to reach the orbit) And liquid hydrogen was definitely not an option to use in reentry vehicles, while kerosene + peroxide were an obvious choice, relatively safe and relatively efficient. Edited June 29, 2020 by kerbiloid Quote Link to comment Share on other sites More sharing options...
DDE Posted June 29, 2020 Share Posted June 29, 2020 13 hours ago, wumpus said: or was he only interested in missile engines and demanded a high shelf life for all his fuels? He did not consider that quality to be exclusive to missile engines. Going from another quote of his in my RD-600 post (also found on Atomic Rockets) he argued chemical terrestrial rocketry was peaking already, that all interplanetary flight will be nuclear or ion-based, and that further developments shoukd be directed at storeable lander engines. Quote Link to comment Share on other sites More sharing options...
DDE Posted July 7, 2020 Share Posted July 7, 2020 https://www.rbc.ru/society/07/07/2020/5f0436be9a7947655c8bc9c9 Rogozin's deputy arrested on suspicions of treason. Quote Link to comment Share on other sites More sharing options...
DDE Posted July 7, 2020 Share Posted July 7, 2020 9 hours ago, DDE said: https://www.rbc.ru/society/07/07/2020/5f0436be9a7947655c8bc9c9 Rogozin's deputy arrested on suspicions of treason. Can't say it doesn't fit the rather broad definition, then. Quote Link to comment Share on other sites More sharing options...
DDE Posted July 16, 2020 Share Posted July 16, 2020 Quote Link to comment Share on other sites More sharing options...
tater Posted July 18, 2020 Author Share Posted July 18, 2020 Quote Link to comment Share on other sites More sharing options...
tater Posted July 18, 2020 Author Share Posted July 18, 2020 Quote Link to comment Share on other sites More sharing options...
tater Posted July 20, 2020 Author Share Posted July 20, 2020 Quote Link to comment Share on other sites More sharing options...
tater Posted July 23, 2020 Author Share Posted July 23, 2020 Quote Link to comment Share on other sites More sharing options...
DDE Posted July 23, 2020 Share Posted July 23, 2020 Insertion, separation and solar array deployment confirmed. Quote Link to comment Share on other sites More sharing options...
tater Posted July 23, 2020 Author Share Posted July 23, 2020 Quote Link to comment Share on other sites More sharing options...
DDE Posted July 23, 2020 Share Posted July 23, 2020 (edited) And now for something completely different: Edited July 23, 2020 by DDE Quote Link to comment Share on other sites More sharing options...
tater Posted July 23, 2020 Author Share Posted July 23, 2020 Quote Link to comment Share on other sites More sharing options...
DDE Posted July 23, 2020 Share Posted July 23, 2020 5 minutes ago, tater said: Quote TORU *angry Mir noises* Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted July 23, 2020 Share Posted July 23, 2020 36 minutes ago, DDE said: *angry Mir noises* Why not? Anyway ISS is old and wants to deorbit. One module more or less... Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted July 23, 2020 Share Posted July 23, 2020 They could use docking scripts for kOS. Quote Link to comment Share on other sites More sharing options...
DDE Posted July 24, 2020 Share Posted July 24, 2020 "Right! No, other right!" Quote Link to comment Share on other sites More sharing options...
DDE Posted July 24, 2020 Share Posted July 24, 2020 Shoigu's guys have just presented a plastic model of the Krylo-SV (miniaturized Baikal) methalox winged fly-back booster at their seaside... research center in Anapa. It's slightly taller than a human and is painted white and blue, which, according to the reporters, is very important. https://ria.ru/20200724/1574866932.html Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted July 24, 2020 Share Posted July 24, 2020 (edited) Why not combine them in dual blocks to get a lifting body flying catamaran, with symmetric wings (one per tank), and extendable fin with turbojet in between. When I grow up, I will do this in KSP. Edited July 24, 2020 by kerbiloid Quote Link to comment Share on other sites More sharing options...
DDE Posted July 26, 2020 Share Posted July 26, 2020 Someone in Energia really hates the superheavy boosters. So they have just patented a reusable lander-tug combo permanently hosted at the ISS. The catch: each sortie requires three fuel tankers launched by hydrolox Angara-5s: one at the ISS, one on the Moon surface, and one during the return Moon-Earth flight. https://ria.ru/20200725/1574896030.html Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted July 26, 2020 Share Posted July 26, 2020 (edited) It's the most Kerbal plan I ever read about... Just 4 launches and 5 dockings per flight. What can go wrong. Edited July 26, 2020 by kerbiloid Quote Link to comment Share on other sites More sharing options...
DDE Posted July 26, 2020 Share Posted July 26, 2020 3 hours ago, kerbiloid said: It's the most Kerbal plan I ever read about... I remeber some Westerm commenter tried to cram a Chinese moon landing into the older Long March rockets - ten of them, or so. Quote Link to comment Share on other sites More sharing options...
Guest Posted July 26, 2020 Share Posted July 26, 2020 I think that the problem is Vostochny cosmodrome. Rails going to Baikonur could handle rockets up to 4.1m, for Vostochny it's 3.9m, IIRC. Both Energia and N1 were problematic, in that they essentially had to be built at Baikonur, and unlike that one, Vostochny has no facilities to that end. I think Angara's upper stages hit the rail transport limits already, so making anything bigger would be a significant logistical challenge. Quote Link to comment Share on other sites More sharing options...
Alcentar Posted July 26, 2020 Share Posted July 26, 2020 5 hours ago, DDE said: Someone in Energia really hates the superheavy boosters. I think everything is much simpler, just modern Russia is not able to create a heavy class rocket. Quote Link to comment Share on other sites More sharing options...
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