Skip to main content

Home/ Advanced Concepts Team/ Group items tagged rockets

Rss Feed Group items tagged

Luís F. Simões

Boeing probes international market for human spacecraft - 1 views

  • The aerospace powerhouse is designing and testing systems for its CST-100 space capsule, a craft the company says could begin flying astronauts to low Earth orbit by 2015. It will launch on existing rockets to lessen development risk and costs.
  • "The spacecraft that we're designing is rocket-agnostic. It would be possible to sell this like a commercial airplane to countries who perhaps have a launch vehicle who would like to launch it in their own country."
  •  
    ...and hitting the news in the same day: A Rocket Built from U.S. and European Parts "A new rocket that would combine parts from NASA's canceled Ares I rocket as well as the Ariane 5 , a well-proven European satellite launcher, could provide a low-cost option for taking crew and cargo to the space station. The rocket proposal was announced this week by ATK, an aerospace and defense company that manufactures the solid rocket motors for NASA's space shuttles, and Astrium, the European company that makes the Ariane 5. They say the rocket, called Liberty, would be ready for flight by 2015." "Other commercial companies, including Boeing and Orbital Sciences Corporation, are looking to use low-end versions of the Atlas V to carry the capsules they are building. Liberty could carry any capsule at a cost less than that of the Atlas V, according to ATK." Look! Competition! :)
LeopoldS

SpaceX Targets 2013 for Launch of Falcon Heavy | SpaceNews.com - 1 views

  •  
    big big booster coming ... !
  • ...1 more comment...
  •  
    In similar story (http://www.orlandosentinel.com/news/os-spacex-rocket-elon-musk-20110405,0,3234336.story) the quote: " "This is a rocket of truly huge scale," said Musk, adding it would have the capability to one day enable moon or Mars missions." tells a lot about the ambition of it...
  •  
    even bigger booster also coming: China Aims To Build World's Largest Rocket "Back in March, China revealed it is studying the feasibility of designing the most powerful carrier rocket in history for making a manned moon landing and exploring deep space, according to Liang Xiaohong, vice head of the China Academy of Launch Vehicle Technology. The rocket is envisaged to have a payload of 130 tonnes, five times larger than that of China's current largest rocket. This rocket, if built, will eclipse the 53 tonne capacity of the planned Falcon 9 Heavy from SpaceX. It will even surpass the largest rocket ever built, the 119-tonne Saturn V."
  •  
    still only "is studying the feasibility of designing a powerful carrier rocket" - we could easily do the same at no cost almost ... but still ... they might be serious ...
Ma Ru

Russian cargo rocket crashes - 1 views

  •  
    So... basically they are the only guys who now do human spaceflight?
  •  
    and 2nd failed launch for Russian in 10 days. http://www.nasaspaceflight.com/2011/08/proton-m-launches-russias-ekspress-am4-communications-satellite/ although this one is a giant space debris stuck on the GTO.
  •  
    ESA's article on the consequences for ISS: http://www.esa.int/esaCP/SEM6GJUTTRG_index_0.html What is not clear is if the rocket that failed is the same variant as used in manned missions. [Edit] According to this article: http://www.interfax.com/newsinf.asp?pg=3&id=268437 "The first and second stages of the Soyuz-FG space rocket used for manned launches differ from those of the Soyuz-U, but the third stage [the one that failed - MR] is identical in both rockets". Thus the stay of astronauts currently at ISS may prolong a little bit.
Thijs Versloot

Relativistic rocket: Dream and reality - 3 views

  •  
    An exhaustive overview of all possible advanced rocket concepts, eg.. "As an example, consider a photon rocket with its launching mass, say, 1000 ton moving with a constant acceleration a =0.1 g=0.98 m/s2. The flux of photons with E γ=0.5 MeV needed to produce this acceleration is ~1027/s, which corresponds to the efflux power of 1014 W and the rate of annihilation events N'a~5×1026 s−1 [47]. This annihilation rate in ambiplasma l -l ann corresponds to the value of current ~108 A and linear density N ~2×1018 m−1 thus any hope for non-relativistic relative velocity of electrons and positrons in ambiplasma is groundless." And also, even if it would work, then one of the major issues is going to be heat dispersal: "For example, if the temperature of radiator is chosen T=1500 K, the emitting area should be not less than 1000 m2 for Pb=1 GW, not less than 1 km2 for Pb=1 TW, and ~100 km2 for Pb=100 TW, assuming ε=0.5 and δ=0.2. Lower temperature would require even larger radiator area to maintain the outer temperature of the engine section stable for a given thermal power of the reactor."
  • ...2 more comments...
  •  
    We were also discussing a while ago a propulsion system using the relativistic fragments from nuclear fission. That would also produce an extremely high ISP (>100000) with a fairly high thrust. Never really got any traction though.
  •  
    I absolutely do not see the point in a photon rocket. Certainly, the high energy releasing nulcear processes (annihilation, fusion, ...) should rather be used to heat up some fluid to plasma state and accelerate it via magnetic nozzle. This would surely work as door-opener to our solar system...and by the way minimize the heat disposal problem if regenerative cooling is used.
  •  
    The problem is not achieving a high energy density, that we can already do with nuclear fission, the question however is how to confine or harness this power with relatively high efficiency, low waste heat and at not too crazy specific mass. I see magnetic confinement as a possibility, yet still decades away and also an all-or-nothing method as we cannot easily scale this up from a test experiment to a full-scale system. It might be possible to extract power from such a plasma, but definitely well below breakeven so an additional power supply is needed. The fission fragments circumvent these issues by a more brute force approach, thereby wasting a lot of energy for sure but at the end probably providing more ISP and thrust.
  •  
    Sure. However, the annihilation based photon rocket concept unifies almost all relevant drawbacks if we speak about solar system scales, making itself obsolete...it is just an academic testcase.
Marcus Maertens

Rocket Lab Announces Reusability Plans For Electron Rocket | Rocket Lab - 0 views

  •  
    They want to catch the first stage of the Electron "Mid-air", using a helicopter. Would love to see that!
Juxi Leitner

Slashdot Science Story | Calculating Environmental Damage From Space Tourism Rockets - 3 views

  •  
    Cynthia - please have a look ... can we check the OoM?
  •  
  •  
    Yeeesss :) So the "non-commercial" rockets do not emit soot? And how many "non-commercial" launches per year are there in comparison to the commercial ones? Finally commercial space-flight seems more realisable than ever, and "non-commercial" guys will do everything to prevent situation in which they have to compete on an open market... Coming years should be very interesting...
ESA ACT

Ride a Maglev Rocket to space - 0 views

  •  
    They planned to use a Maglev rocket to ride to space
Alexander Wittig

Trump Asks NASA to Explore Putting Crew on Rocket's Debut Flight - 0 views

  •  
    Trying the new rocket with humans right away (and 1.5 years to go). What can possibly go wrong? The Trump administration has directed NASA to study whether it is feasible to fly astronauts on the debut flight of the agency's heavy-lift rocket, a mission currently planned to be unmanned and targeted to launch in late 2018, officials said on Friday.
Dario Izzo

Back to Earth with a splash! Fisherman finds car-sized fragment of a SPACE ROCKET in a ... - 4 views

  •  
    ooops ....
  •  
    Where is the sticker saying "if found, please post this item unstamped to the following address"?
  •  
    Yup, it's ours... Still, better take it out of the river than in the face. Such a big one especially.
Joris _

French Bond Issue To Fund Rocket Satellite Projects | SpaceNews.com - 1 views

  • France is focusing on a modular rocket whose different versions would carry government satellites into low Earth orbit and commercial telecommunications satellites weighing up to 6,000 kilograms into geostationary-transfer orbit
Ma Ru

My rocket is my clothes - 2 views

  •  
    Rather unconventional approach to human spaceflight...
Joris _

What the strange persistence of rockets can teach us about innovation. - 5 views

  •  
    If I could write, this is exactly what I would write about rocket, GO, and so on... :) "we are decadent and tired. But none of the bright young up-and-coming economies seem to be interested in anything besides aping what the United States and the USSR did years ago. We may, in other words, need to look beyond strictly U.S.-centric explanations for such failures of imagination and initiative. ... Those are places we need to go if we are not to end up as the Ottoman Empire of the 21st century, and yet in spite of all of the lip service that is paid to innovation in such areas, it frequently seems as though we are trapped in a collective stasis." "But those who do concern themselves with the formal regulation of "technology" might wish to worry less about possible negative effects of innovation and more about the damage being done to our environment and our prosperity by the mid-20th-century technologies that no sane and responsible person would propose today, but in which we remain trapped by mysterious and ineffable forces."
  • ...4 more comments...
  •  
    Very interesting, though I'm amused how the author tends to (subconsciously?) shift the blame to non-US dictators :-) Suggestion that in absence of cold war US might have abandoned HB and ICBM programmes is ridiculous.
  •  
    Interesting, this was written by Neal Stephenson ( http://en.wikipedia.org/wiki/Neal_Stephenson#Works ). Great article indeed. The videos of the event from which this arose might be equally interesting: Here Be Dragons: Governing a Technologically Uncertain Future http://newamerica.net/events/2011/here_be_dragons "To employ a commonly used metaphor, our current proficiency in rocket-building is the result of a hill-climbing approach; we started at one place on the technological landscape-which must be considered a random pick, given that it was chosen for dubious reasons by a maniac-and climbed the hill from there, looking for small steps that could be taken to increase the size and efficiency of the device."
  •  
    You know Luis, when I read this quote, I could help thinking about GO, which would be kind of ironic considering the context but not far from what happens in the field :p
  •  
    Fantastic!!!
  •  
    Would have been nice if it were historically more accurate and less polemic / superficial
  •  
    mmmh... the wheel is also an old invention... there is an idea behind but this article is not very deepfull, and I really don't think the problem is with innovation and lack of creative young people !!! look at what is done in the financial sector...
Joris _

Beam Me Up: Could Lasers Launch Rockets? - 1 views

  •  
    another hill to climb (in reference to a metaphor of a recent post)
johannessimon81

NASA Fires Up Rocket Engine Made of 3-D Printed Parts - 0 views

  •  
    I remember that ESA was looking into similar things for the Vulcain 2/2+ NE upgrade together with Volvo and other companies. Does anybody know about the status of that program (google does not ;-))?
Nina Nadine Ridder

Failed strut caused SpaceX rocket blast: CEO Elon Musk - 3 views

  •  
    The SpaceX Falcon 9 explosion was caused by a failed strut that allowed a helium bottle to burst free inside the rocket's liquid oxygen tank, CEO Elon Musk said Monday. "One of those struts broke free during flight," Musk told reporters on a conference call to discuss the June 28 blast on what was supposed to be a routine cargo mission to the International Space Station.
  •  
    I guess this is how it starts as they mentioned they will inspect struts individually before each flight. Also for the space shuttle they believed a rapid inspection between launches would be feasible, but in the end there was a need for individual assessment almost. And we haven't even considered human spaceflight yet.
  •  
    as predicted, first failure, first inquiry board, first new safety procedures ... and certainly many more will follow and all will make sense but with the risk of loosing the competitive edge
Nina Nadine Ridder

Moon Express, Rocket Lab set for 2017 mission plan - 1 views

  •  
    In 2017 a private moon landing could make news. If the mission is successful, said GeekWire, Moon Express could become the first privately backed venture to achieve a soft lunar landing. Bob Richards is CEO of Moon Express and he announced the launch plan earlier this month at the Space Technology & Investment Summit in San Francisco.
  •  
    Bob Richards ist ja kein unbeschriebenes Blatt ...
LeopoldS

SpaceX Undercut Competition to Clinch Head turning Iridium Deal | SpaceNews.com - 0 views

  •  
    very nice success by what we called in 2003 "the second space age" ... for Joris: (related to the discussion we had the other day) But the spacecraft will be assembled, integrated and tested in the United States and will include U.S. hardware, meaning they would not be allowed for launch aboard Indian or Chinese rockets under current U.S. regulations.
1 - 20 of 77 Next › Last »
Showing 20 items per page