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High speed and fuel in space

Posted by: inventor - Sat Mar 06, 2010 12:24 am
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High speed and fuel in space 
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Spaceflight Trainee
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Post High speed and fuel in space   Posted on: Sat Mar 06, 2010 12:24 am
I propose it takes less energy to move a car in space than it takes to move it on earth. There has been the impression that a great amount of energy is needed to get to space and operate in space.


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Space Walker
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Post Re: High speed and fuel in space   Posted on: Sat Mar 06, 2010 2:59 pm
because it does take a great amount of energy to get to space.
even operating in Low Earth Orbit, you have to maintain a constant velocity, there is still drag on the vehicles (gravity) that needs to be over come.

either way you still have to lift a certain amount of mass to a certain altitude, against gravity, against the resistance of the atmosphere, etc. and with Chemical rockets (or any system in the foreseeable future), that takes a great deal of energy. at this point there is no way around that.


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Post Re: High speed and fuel in space   Posted on: Sat Mar 06, 2010 3:04 pm
There's that speed word again. :?

johno


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Post Re: High speed and fuel in space   Posted on: Sat Mar 06, 2010 7:23 pm
Things like Ion engines are useful in space because it takes very little force to alter the velocity of something in deep space.

Things like the Interplanetary Transport Network exist, that allow travel through out the solar system for very small amounts of energy. Although it takes ages to get anywhere.

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