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78,000 people apply for trip to Mars


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#46    Lex540

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Posted 19 May 2013 - 09:29 AM

whats the gain being the first 78000 people on mars i think its joke


#47    DONTEATUS

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Posted 19 May 2013 - 08:03 PM

Welcome to the Forum  Lex540 ! Well until we invent mass transit to Mars the only thing going to Mars are our little probes ! THe Manned missions is far,Far away !

This is a Work in Progress!

#48    Waspie_Dwarf

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Posted 20 May 2013 - 11:50 PM

View Postdanielost, on 16 May 2013 - 09:19 PM, said:

Yes, we have.  Yet the shows on nuclear subs. Clearly state that they make their own water.
The make their own DRINKING water by PURIFYING salt water. A big difference. Go back and look at the link to my original post. I showed, with sources, that you were wrong. You made claims then, as you are now, that your sources did not provide. The big difference between you and I is that I don't make stuff up and then claim I saw it in TV, I provide sources for my claims.

View Postdanielost, on 16 May 2013 - 09:19 PM, said:

Besides the shuttle made its own water.
Correct, water is a waste product of the power cells which generate electricity by reacting hydrogen and oxygen together (see HERE). The thing is that the amount of hydrogen and oxygen you have to carry is equal in mass to the water you generate. The shuttle needed to supply 7 people for maybe 2 weeks, not dozens of people for months or years. That is why submarines don't use this technique and instead PURIFY the water that surrounds them.

View Postdanielost, on 16 May 2013 - 09:19 PM, said:

The only water they carried was for the station.
They didn't even carry water for the station. The fuel cells provided more water than was need for the shuttle crew. Before the ISS this water was dumped over board. This "waste" water is what the shuttle provided to the station.

Quote

Lost water will be replaced by carrying it over from the Shuttle or from the Russian Progress rocket. The Shuttle produces water as its fuel cells combine hydrogen and oxygen to create electricity, and the Progress rocket can be outfitted to carry large containers of water.
Source: Science at NASA

View Postdanielost, on 16 May 2013 - 09:19 PM, said:

Seems you need an engine or a power generater to make your own water.
You need a fuel cell.
Ask yourself the following question: a nuclear submarine gets all the power it needs from a nuclear reactor, it is surrounded by water, why would it need to carry vast quantities of a highly explosive gas (hydrogen) and fuel cells to make water when it is surrounded by the stuff? How does that make any sense?


View Postdanielost, on 16 May 2013 - 09:19 PM, said:

Further the apollo ships didn't carry water.
Correct.

View Postdanielost, on 16 May 2013 - 09:19 PM, said:

They taped their engine for it.
Wrong.

The Apollo Service Propulsion System used a mixture of hydrazine and unsymmetrical dimethylhydrazine for fuel and nitrogen tetroxide for oxidiser. These are toxic.

They carried hydrogen and oxygen for the fuel cells in the same way the shuttle did and it was this that provided the water.

Quote

Service Propulsion System

The 20,500-pound-force (91,000 N) SPS engine was used to place the Apollo spacecraft into and out of lunar orbit, and for mid-course corrections between the Earth and Moon. The engine used was an AJ10-137 engine[6] using Aerozine 50 as fuel and nitrogen tetroxide (N2O4) as oxidizer. The propellants were pressure-fed to the engine by 39.2 cubic feet (1.11 m3) of gaseous helium at 3,600 pounds per square inch (25 MPa), carried in two 40-inch (1.0 m) diameter spherical tanks.
Source: Wikipedia

View Postdanielost, on 16 May 2013 - 09:19 PM, said:

The only apollo that needed tp store water was 13  and that is because they had to shut down their engine.
Nearly right. In fact the engine wasn't in use at the time. They were coasting towards the Moon. The service module engine would next have been fired to place the spacecraft in lunar orbit (which of course it never did). The service module engine was not used again because it was not known how badly damaged it was.

What exploded on Apollo 13 was an oxygen tank. As I have already shown above this was not needed for the service module engine. It was needed however for the fuel cells. It was the shutting down of the 3 fuel cells that led to the shortage of water.

View Postdanielost, on 16 May 2013 - 09:19 PM, said:

I will take the shows word over yours becaue you have been wrong before.
Yes I have been wrong before but far fewer times than you. The other difference between you and me is that I admit when I'm wrong. I don't get proven wrong and then repeat the same mistakes in another thread. I don't just make up stuff and then say "I saw it in TV". You don't have to take my word because I provide sources, you NEVER do. If you choose to believe your self over reliable source that is your choice, but I will continue to put right the misinformation you post in topic after topic. I don't post for your benefit, I post for others that deserve the truth.

Edited by Waspie_Dwarf, 20 May 2013 - 11:51 PM.
typo

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#49    danielost

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Posted 23 May 2013 - 07:47 PM

You were correct, after I did some more research.  How ever they should to fuel cells.  Because the steam  noise can be detected by sonar and the salt trail can also be detected.  Your links did not help two years .


My point was we know how make water.

Edited by danielost, 23 May 2013 - 07:49 PM.

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