NASA & World Space Exploration...News, Views, Photos & videos

Discussion in 'Members' Club Room' started by bd popeye, Jul 2, 2012.

  1. bd popeye
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    bd popeye The Last Jedi
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    Re: World News Thread & Breaking News!!

    there were 14 astronauts killed in the two space shuttle disasters. I once read that the expected failure rate of a space shuttle was 37%.

    To be fair in comparing the programs since the first space shuttle launch in 1981 until the last in 2011 there were 135 launches with two failures. 35 of those missions were to the ISS.

    True the Soyuz has had no disasters since 1971. Since April 1981 there have been 46 Soyuz missions.
     
    #41 bd popeye, Sep 2, 2012
    Last edited: Sep 2, 2012
  2. Equation
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    Equation Lieutenant General

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    Re: World News Thread & Breaking News!!


    I don't know dude, it would require more rocket launches to equal one shuttle launch. And if you think the bureaucratic red tapes with the shuttle missions were bad, imagine the Saturn V rockets having to go through all that, plus more because its payload is smaller.
     
  3. jackliu
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    jackliu Banned Idiot

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    Re: World News Thread & Breaking News!!

    Soyuz is just a more efficient design, it does not take a lot of subsystems to build a metal ball to send it up and down, which is also what Shenzhen spacecraft look like as well, and notice it is also almost all of the SpaceX craft's has same design as well, do you have any idea just how many maneuvers that the shuttle have to go through during landing stage? All of them present potential failure if just one component fails, such as the heat shield.
     
  4. jackliu
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    jackliu Banned Idiot

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    Re: World News Thread & Breaking News!!

    COME ON MAN!!!!! Do you have any idea what is the payload for Saturn V? The payload to LEO for Saturn V is 120,000 kg, and it still remains the most powerful rocket ever build in human history.

    The payload to LEO for Space shuttle is only 24,400 kg to LEO.

    The argument should be the other way around, it would take 4-5 Space shuttle launch for one single Saturn V launch.

    And do you know what United State is trying to do at this very moment? They are in the process of developing the SLS rocket family, which at earliest would be fully operational after 2020, and guess what? It is targeted payload is 70,000-130,000 km to LEO. By all intended purposed, they are trying to rebuilding Saturn V!!!!

    And remember, they abandoned Saturn rockets to fund the Space shuttle!!!! So what does that tell you?
     
  5. solarz
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    solarz Brigadier

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    Re: World News Thread & Breaking News!!

    The fact that there were almost 3 times as many shuttle launches than soyuz missions in the last 30 years is a pretty good argument for the value of the space shuttle program.

    In the end, I look at it this way: eventually mankind *will* need a reusable spacecraft if we want to do more than just send people into orbit. The space shuttle is the first step toward that goal, and like all first steps in the story of technology, it's massively expensive, dangerous, and eventually gets scrapped. However, the lessons learned from it will be invaluable as we move forward.
     
  6. delft
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    Re: World News Thread & Breaking News!!

    The specification for the Shuttle included a payload in low earth orbit of 30 tons. Initially they remained well below that and I don't know if it was reached after all the modifications. The launch weight was about 1800 tons.
    The Saturn V had a launch weight of some 3000 tons and could take 120 tons into low earth orbit. ( I'm doing this from memory, am about to go to bed and I'm too lazy to look it up in wikipedia ).
    To achieve a low cost to orbit of the payload each Shuttle was intended to be launched once every six weeks or so. It came out at about twice a year. A major factor was the immense amount of work necessary to turn a Shuttle around. In that respect the Shuttle was an economic disaster.

    If you want to launch payloads of 30 tons into low earth orbit you can use LOX/kerosene rockets of some 900 tons, possibly with an upper stage of LH2/LOX. You can use LOX/kerosene boosters that fall into the ocean and may be reused. If you use series production for your rockets your costs will be much lower than achievable by a Shuttle with 1970's technology and probably also with 2010's technology. But choosing that 1972 would have meant imitating/improving on the Soviets and that wouldn't have won the election for Richard Nixon.
     
  7. jackliu
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    jackliu Banned Idiot

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    Re: World News Thread & Breaking News!!

    Also notice US is in the process of developing this rocket Space Launch System - Wikipedia, the free encyclopedia, it is basically reproduction of Saturn V.

    And China is also developing their super thrust rocket the Long March 9, which will have 100,000 kg to LEO ability.
     
    #47 jackliu, Sep 3, 2012
    Last edited: Sep 3, 2012
  8. Franklin
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    Franklin Captain

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    Re: World News Thread & Breaking News!!

    What do you guys make of this ?

    [video=youtube;EfJiNPZ38kY]http://www.youtube.com/watch?v=EfJiNPZ38kY[/video]
     
  9. bd popeye
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    bd popeye The Last Jedi
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    Re: World News Thread & Breaking News!!

    First I've ever heard of it. It would take a cover up of unbelievable proportions to cover this whole thing up. It would be endless. And as much as Americans like to talk why have no NASA scientist involved ever come forward to "spill the beans"?? I call BS on this one.
     
  10. Equation
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    Equation Lieutenant General

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    Re: World News Thread & Breaking News!!

    It tells me that NASA wanted more people in orbit for research. If the rocket is that great in payload capacity how come there's only 3 crew members the max? Meanwhile the shuttle can take up to 6 crew members or more easily. The shuttle is more mission flexible as the cargo bay area can be used as space lab while in LEO and carrying robotic arm to bring in satellites that needs fixing. Can't do that with a space capsule could ya (no don't count docking modules)?
     
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