[ATM] ATM Fluid Drive Rate Regulation Ideas

["The Alarm Co." <tac@i1.net>]

Flash! the rate of flow from the waterbag depends on the height of water
PLUS the weight of the telescope it's supporting!  The change in flow rate
as the water drains is much, much less than if it were just a bag of water.
Taking it to the logical conclusion, if the fluid were weightless, the flow
rate would be extremely constant, varying only with the weight exerted by
the scope, which would change as it tracks.  Air is undesirable as a fluid
for many reasons, but what about a liquid less dense than water?  Brake
fluid? Hydraulic fluid? Alcohol? (attractive because of its alternative
uses).  Brake fluid seems a good choice.  Its viscosity changes less with
temperature than motor oil, or probably hydraulic fluid for instance.  It's
more viscous than water, and so easier to seal (not true of alcohol!).

 *  Best regards, Bob
*
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