[extropy-chat] unidirectional thrust

[Dirk Bruere]

Mike Lorrey wrote:

>--- Dirk Bruere <dirk at neopax.com> wrote:
>  
>
>>Mike Lorrey wrote:
>>
>>    
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>>>The mass of an electron is incredibly small, no doubt, but the
>>>velocities we are talking about are very significant. This likely
>>>      
>>>
>>will
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>>>not get us high fraction of 1 g accelerations by any stretch of the
>>>imagination but it will give us, IMHO, a way to dump a lot of energy
>>>into propulsion without wasting mass. (and no, Dirk, doing so is not
>>>over unity if the work done is less than the amount of energy put
>>>      
>>>
>>in,
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>>>please go back and read your physics textbooks). Once stable long
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>>term
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>>> 
>>>
>>>      
>>>
>>It's you who should do more reading.
>>In space with no universal reference frame a constant energy input 
>>translating to constant acceleration can produce arbitrarily large 
>>amounts of energy.
>>It is only with respect to a fixed reference frame that energy is 
>>conserved - in which case SR and GTR are history.
>>    
>>
>
>I believe scirer posted a link showing that Einstein was off.
>
>
>  
>
That will come as news to the people over in sci.physics.research
It's a *very* minority view and the whole field of relativity is 
infested by cranks who cannot give up the Ether theories.

-- 
Dirk

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