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Starship 12.5km launch

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wraper:

--- Quote from: olkipukki on December 12, 2020, 08:21:31 pm ---Is it came from the same proverb list that famous "There is no sex in the USSR"?  ::)

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Almost everyone is oblivious that the complete phrase was "There is no sex in the USSR... on TV". Poor woman who became a joke with no fault of her.

wraper:

--- Quote from: S. Petrukhin on December 12, 2020, 04:27:33 pm ---I don't really understand why 22800 is 2 times more than 23000... :) I do not know what LEO is, GTO is the height of the orbit, probably?

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Do you not understand that volume != mass? https://en.wikipedia.org/wiki/Geostationary_transfer_orbit https://en.wikipedia.org/wiki/Low_Earth_orbit

--- Quote ---Proton is a very old rocket that has existed since the very beginning of space exploration.
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And that's why Russian space industry sucks. The only new thing that was made is Angara that does not have anything truly innovative, nor makes any economic sense as it's more expensive. An old horse beaten to death is still used because of that.

--- Quote ---I do not know the exact reliability statistics and will not argue.
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It sucks. Both in USSR and more modern times. IIRC about 1 in 10 Proton launces resulted in failures. Was especially bad in 2010-2014. Do you not remember fiasco with 3 out of 6 angular velocity sensors mounted upside down?
 




jogri:

--- Quote from: wraper on December 12, 2020, 08:37:02 pm ---It sucks. Both in USSR and more modern times. IIRC about 1 in 10 Proton launces resulted in failures. Was especially bad in 2010-2014. Do you not remember fiasco with 3 out of 6 angular velocity sensors mounted upside down?

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To be fair, Vega VV17 was also a thing... ESA rocket were someone switched the cables for two thrust vectoring actuators. Or Starliner who was launched with software that would rival Cyberpunk2077 on the PS4 in the category of "most tested/best performing software". The problem of underfunding/lack of quality control is plaging the entire industry, Russia is just the most extreme example (nearly all problems with Protons could have probably been prevented with more thorough testing).

And the Proton has one huge issue when it comes to launch failures: It still uses the N2O4/UDMH combo. Ivan sees a thing he likes, Ivan uses it. When Ivan needs more thrust, he builds himself a bigger rocket with the same propellants.
That stuff might be a nice propellant, but the cleanup following a launch failure is a royal PITA. Hydrazine is not the tamest chemical, and the N2O4 will corrode everything in sight (that's the orange clouds in the video).

Falcon 9 uses oxygen and jet fuel, so the cleanup is rather tame in comparison.

Btw, don't be too hard on Angara when we still have SLS on the table...

wraper:

--- Quote from: jogri on December 12, 2020, 10:56:15 pm ---don't be too hard on Angara when we still have SLS on the table...

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SLS is waste of money and resources on a grand scale. Actually Dragon and CST-100 were severely delayed exactly because most of the money/resources had gone to that junk based on old technology. And even when it's design is finished, it's will be not sustainable because of it's huge price.

--- Quote ---Cost per launch Over US$2 billion excluding development
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Hell yeah,  :palm:

rdl:

--- Quote from: S. Petrukhin on December 12, 2020, 06:21:10 am ---Please, explain what makes SpaceX so happy?
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What makes SpaceX "so happy" is that this event was progress toward people living on Mars. Everything they do is focused on that goal. And just about everything that they do has required going where no one has gone before. Not just "inventing the wheel" as you seem to think. I've never believed that goal was realistic, but as more and more progress is made my opinion slowly changes. This test flight of Starship will probably prove to be an epic milestone.

I didn't really take to Elon Musk at first and I'm still not a fan, but his company SpaceX has been one of the best things that has happened for America, everyone really. If nothing else, they have made 2020 much less miserable than it would have been.

I would suggest that you educate yourself on the current state of space technology before making additional comments. There are many excellent resources available. Watch some of the spaceflight related videos on youtube by Scott Manley and Tim Dodd and others. It will be time well spent.

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