On Sun, 7 Sep 2008 23:37:10 +0100, Larry C wrote
(in article qIYwk.766$sq3.307@trnddc07):

I live in North East Mass if that matters.

That's a relief. Remember that as you move further south, you need to add
more coils to your dustpipe, otherwise you'll be fighting the natural cyclone
action appropriate to latitude in the northern hemisphere, Once you cross the
equator, you have to reverse the direction of twist otherwise you'll be in
_real_ trouble.

On the equator itself you can get away with straight pipe. but try to keep it
running east-west.

Feel pity for those in northermost Alaska who must have their DC mounted
_directly_ below them, with minimal horizontal runs as they have far more
latitude than longitude up there, with the obvious effect you'll all be
familiar with - (which I suppose is better than all the south polar
woodworkers who have to have theirs built on towers to keep the line going
directly UP.)


I hope this helps.

























:-)