Re: (TFT) Forge of Fury. --> Ricks comments.

[Martin Gallo <martimer@mindspring.com>]

While it certainly is an interesting theory I think there are some 
small holes in it. You address one of the problems - wind speed. 
Another is that the air will eventually cool, thus lowering the 
pressure and reducing (or even reversing the direction of) the flow.

It is a terrific concept that could be explored a bit more.

> Rick,
>   Here's a bit of dwarven engineering you might like.  I used it in 
> a a Warhammer FRP game; it's a scheme for an underground canal.
>
> Step one.  The dwarves mine a straight shaft from one side of a 
> mountain range to another (no small matter, of course, but if those 
> maniacs built Moria this should be a reasonable proposition).  The 
> shaft slopes very gently downward from one side of the range to the 
> other.
>
> Step two.  Divert an underground river to flow through the shaft.
>
> Step three.  Divert a strong continual flow of warm air into the 
> shaft, starting at the 'low' end.  (Where does this air come from? 
> Forges, perhaps, or magma for something more exotic.)  Being warm, 
> the air will flow up the shaft.
>
> So you have water flowing in one direction and a constant air 
> current in the other direction.  This gives easy travel in either 
> direction.  To go downstream, furl your sail and ride the current. 
> To go upstream, use sails.  There's no annoying tacking and 
> maneuvering, the wind is blowing right in the direction you want to 
> go.
>
> Of course the current has to be pretty moderate or the wind would 
> have to be gale force.  And it's probably not sufficient to have a 
> single source of warm air, there would need to be several spaced 
> along the canal's length.  But once set up it's pretty low 
> maintenance.  In any case it's a lot easier than most canal schemes, 
> with their towpaths and whatnot.
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