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Solar Sail Spacecraft

  1. Jun 21, 2005 #1

    Gokul43201

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    http://news.bbc.co.uk/2/hi/science/nature/4110912.stm

    http://msnbc.msn.com/id/8291710/
    http://www.rferl.org/featuresarticle/2005/6/5B9C7AAC-6F11-424A-9CD3-2B12F1B9252D.html
    http://planetary.org/solarsail/prelaunch_report1_20050523.html
     
  2. jcsd
  3. Jun 21, 2005 #2

    FredGarvin

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    I heard about this. Even though it is cool, what's the purpose of a sub launch? Is it just to launch from a particular location?
     
  4. Jun 21, 2005 #3

    Astronuc

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    It would seem a disadvantage to launch so far north, not taking advantage of the earth's rotation toward the equator.
     
  5. Jun 21, 2005 #4

    Clausius2

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    I heard about Cosmos Mission one year ago in the newspaper. I have not seen the links yet (I have lot of work to do around here, sorry), but it seems to me it is prepared for interplanetary travel, and it would need some fashion of thrust engine to escape from Earth gravitational field, wouldn't it?. Also the acceleration time would seem very large.
     
  6. Jun 21, 2005 #5

    enigma

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    I'm kinda curious why they wanted that launch location as well. I could understand the sub launch if they moved down to the equator to do it.

    The package must have been sized to be mounted on the subs missiles.
     
  7. Jun 21, 2005 #6

    Astronuc

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    Perhaps the package is light enough, i.e. much less than a typical warhead, which means that it might be able to get to orbit or escape.

    I wonder if they added a small booster stage.

    On the other hand (from Wikipedia, http://en.wikipedia.org/wiki/Volna) -
    NASA's site - http://sse.jpl.nasa.gov/news/display.cfm?News_ID=711

    The Planetary Society site (www.planetary.org) seems to be having problems.
     
  8. Jun 21, 2005 #7
    I was reading around today on it
    in it weights in at approx. 220 lbs
    and they did have to add an extra booster stage to get the required thrust
     
  9. Jun 21, 2005 #8

    enigma

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    Information on the R-29 launch vehicle:

    http://www.astronautix.com/lvs/r29.htm

    Looks like it was used to launch a satellite back in 1998 as well. Has a decently sized payload and good reliability as well.

    EDIT: and the reason they used that vehicle... It's dirt cheap. Assuming it's not a typo, launch costs are a paltry 500k [$1999]
     
    Last edited: Jun 21, 2005
  10. Jun 21, 2005 #9
    Yep. Looks like they did. The rocket trip and a boost from a "kick motor" will put the 220.5-pound (100 kg) spacecraft into orbit about 550 miles (885 km) above Earth shortly after 1 p.m. PDT (1800 GMT).

    The reason you can launch that much payload on a converted ballistic missile is due to the fact that the Russian's nukes were always heavier than ours (and why their manned rocket program was ahead of ours).

    Additionally, the reason they launched from a sub is because the Russians will launch anything on their old rockets for REALLY cheap. The whole program, including construction and launch is only going to cost 4 million USD.
     
  11. Jun 22, 2005 #10

    Astronuc

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    Oops!!! Looks like they lost it. NUTS!!!!

    on Yahoo

    http://www.planetary.org/solarsail/

    Solar Sail Latest Updates - http://www.planetary.org/solarsail/latest_update.html
    June 21, 2005
     
  12. Jun 22, 2005 #11
  13. Jun 22, 2005 #12

    FredGarvin

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    Damn propulsion geeks.

    GoAvs....we have a policy against Avalanche fans (especially from Texas). You'll have to change your name. Sorry. Might I suggest something along the lines of "goRW4"?

    Welcome aboard.
     
  14. Jun 22, 2005 #13
    Hey now, I take exception to being called "from" Texas. I might live here, but I am certainly not "from" here (Denver). :wink: I won't even discuss what I think of your suggested name.... :grumpy:

    Thanks for the welcome! :smile:
     
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