[extropy-chat] unidirectional thrust

[Dirk Bruere]

Mike Lorrey wrote:

>--- Dirk Bruere <dirk at neopax.com> wrote:
>  
>
>>Mike Lorrey wrote:
>>
>>    
>>
>>>I would have thought you'd figure out that e=mc^2 describes the
>>>asymptotic limit and the only limits on acceleration are the
>>>      
>>>
>>dilation
>>    
>>
>>>of mass as well as the acceleration vs. pulse frequency curve: i.e.
>>>      
>>>
>>the
>>    
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>>>faster you go, the less acceleration you should get for the most
>>>efficient pulse frequency.
>>>
>>> 
>>>
>>>      
>>>
>>Faster you go *relative to what*?
>>    
>>
>
>Relative to local space of course.
>  
>
Hence SR and GTR go out the window.
BTW, which *bit* of local space?

>BTW: By your calcs, even a Bussard Ramjet is an overunity device as
>well. So I have to question your use of simple newtonian equations for
>a situation which should more properly be solved in a Lorentz frame.
>
>  
>
No, because the energy comes from the inflow and burning of hydrogen and 
the inflow is limited by the speed of light.
There are no such limits on the kind of lifter you envisage.

-- 
Dirk

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