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#151 Re: Human missions » Revive The Saturn V For Mars Direct - Saturn Five » 2002-06-10 10:20:28

Where are the payloads for six Saturn V launches a year going to come from? It would only make sense if NASA had firm plans to send humans to Mars or back to the moon. And the launch cost of a Saturn V are high: about $1.4 billion in today's money!
"[C]heap, frequent, routine access to LEO" would be even farther away today had NASA sticked with the Apollo/Saturn system.
If often wonder just how different things would have turned out had Challenger never happened. In 1985, the year before the desaster, the Shuttle was launched 9 times; the highest Shuttle launch rate ever. The Shuttle could probably have been flying up to 20 times a year by 1990. This would have lowered the launch costs by a factor of three compared with today's costs.
We could do it even today but the sad thing is that the military and comercial industry have turned their backs on the Shuttle.

#152 Re: Human missions » Revive The Saturn V For Mars Direct - Saturn Five » 2002-06-09 16:40:26

The plans for the Saturn V were not destroyed, that's an urban legend. They're savely stored at NASA's Marshall Space Flight Center (on microfilm! ). Although I agree that shutting down the Saturn assembly lines was a very bad idea, whoever was responsible (it were no just the politicians but NASA managers as well since they wanted to use the Saturn launchpads for the Shuttle), I don't like it how the Shuttle is criticized by so many people. It's a technological marvel and an engineering masterpiece. People always say NASA should have chosen a fully reusable design but they forget that the money simply wasn't there and designing a fully reusable launch vehicle in the 70s with the same payload capacity as the current Shuttle might well have proven impossible. Even building an expendable design was one hell of a task. Going from Apollo CSMs to the Space Shuttle was a giant leap.
And there are reasons why NASA went for SRBs instead of liquids: They give you more bang for the buck, meaning they are much more simple and lighter.
Also I think using an external tank was a brilliant idea. It enomously simplified the design and literally cut the engineering work to be done in half (the Shuttle would never have made its first flight in 1981 had NASA chosen a fully reusable design). And ETs can be converted into space stations! Unfortunately NASA has never seriously studied this concept since it was proposed in the early 80s.
To sum up: While the current Shuttle is nowhere near an economically viable, reliable, save launch vehicle it is still a great machine and has unique advantages. smile

#153 Re: Human missions » Rep. Lampson to Introduce Visionary Space Legislat - what do you think about this? » 2002-06-03 15:49:29

I have my doubts, too. Why have the space vehicles to be reusable? Expendables will do just fine. I have the bad feeling that Lampson doesn't know very much about spaceflight, e.g. that staging makes things so much easier...

Nevertheless we should support this bill. It would get us out of LEO very soon and that's essential. I'm all for lunar/asteroid missions (although I would prefer a Mars Direct style mission) prior to the first Mars mission. Let NASA take care of the details (make these spacevehicles expendable! ) and it'll all be fine...

#154 Re: Human missions » Rep. Lampson to Introduce Visionary Space Legislat - what do you think about this? » 2002-05-17 17:58:03

Thanks. Look at bill number 5 :"To promote the development of the United States space tourism industry" smile This guy is on our side.

#156 Re: Human missions » Rep. Lampson to Introduce Visionary Space Legislat - what do you think about this? » 2002-05-16 16:43:50

I checked: Both the Mars Society and the Planetary Society support the bill (of course wink ).

#157 Re: Human missions » Rep. Lampson to Introduce Visionary Space Legislat - what do you think about this? » 2002-05-16 16:33:16

That's exactly how I feel, Canth. But sadly I'm not a US citizen. Does someone know if the Mars Society, Planetary Society or other space advocacy groups support the bill?

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