Randall Young wrote:
> FWIW automotive air filters once worked on this principle, some heavy
> machinery filters still do. They use oil instead of water though.
Did they actually bubble the water throught the oil, or just
use it as a trap?
Some filters use an oil bath filter, which forces the air around
a couple of short corners with a sticky layer of oil at the bottom
of the pot. The theory is that the dirt is heavier and swirls
to the outside on the curve, and thus sticks into the surface of
It doesn't bubble through it though. That would be quite a mess
for an engine eating a few litres of air every fraction of a
Trevor Boicey, P. Eng.
Ottawa, Canada, firstname.lastname@example.org
ICQ #17432933 http://www.brit.ca/~tboicey/
"You might want to crane your necks upwards now to save time." - Homer
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