> Ah, yes, I see how you got a minimum there - multiplying the 
> classical
> parabola by the relativistic mass got you a minimum somewhere beyond 
> the
> singularity. I can imagine how some poor soul digging down the wrong 
> tunnel
> could get itself stuck there :-)

> Luckily E is just mc^2 and tachyons can accelerate and lose energy 
> for
> as long as they like. By the way, you might not have to tunnel to 
> get to
> the other side - why not create particles that go faster than light 
> the
> same way you create the ones that go exactly at c?

This only works for 'my' purpose if you can convert your 'vehicle' to 
these particles as you 'jump'. Niven has AFAIR "correspondence 
particles".  The great trick would be to tunnel your whole 'ship' at 
once. Having some parts doing 0.8C and some others 2.5C at the same 
time would be 'interesting'. But, not for very long at all.


        Russell.


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