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That sounds like a simple way of doing it Jim, no
processor
required. Would probably be wise to make temp cut in
and
pressure settings adjustable to fine tune to your
engine.
Lonnie
----- Original Message -----
Sent: Sunday, March 07, 2004 12:23
PM
Subject: [FlyRotary] Re: Cooling System
Dynamics
I would guess there's a temperature threshold somewhat below
operating temp at which the pressure is pretty close to operating
pressure. If that is so:
Have the temperature, as it rises above
that threshold enable the pressure alarm which would activate when pressure
dropped.
Overpressures (like firing into the water jacket) would activate
the pressure alarm regardless of temperature.
Just a theory .... Jim S.
lonnwood wrote:
Tracy, this has got me to thinking about an alarm system
that would be useful for the coolant pressure gauge.A simple pressure activated warning light would not be useful
because the pressure starts out at zero andgradually
builds, then during different modes of flight when your engine cools the
pressure would go back down.Not having flown with a
water cooled system yet I don't know how much it would
fluctuate.Would it be worthwhile to have a small
processor programmed to keep track of engine temps and comparethose to what the coolant pressure should be, then set the alarm
off if they don't add up?Lonnie
The
best advice I can give is to learn the behavior (not just the static
reading) of your coolant pressure gauge and pay attention to any
anomaly. It tells the whole story IF you know how to interpret
it. Tracy Crook
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