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Re: [FlyRotary] Re: #$!%@$ temperatures still high
Joe,
I was
trying to think of a good way to do this test while in the plane, and outside of
a camp stove or something to boil the water, it would be pretty hard to
do. I don't think that pulling them to test would be too difficult, plus
the sensor resistance goes down as it gets hotter, so any additional resistance
in the ground, or the wiring would make the gauge read cooler, not
hotter.
I
think that I'll test it first out of the plane and see what I get, I can also
measure the resistance at boiling, and then run the plane to the same reading
and check the resistance of the sensor there, just to validate the
readings.
Steve
On 10/6/04 6:46 PM, "Steve
Brooks" <prvt_pilot@yahoo.com> wrote:
Mark,
You raise
a good point. I'm pretty confident in the oil side of the equation.
The digital readout is aircraft certified, and the specs are +- 1/2
degree. The sender is also aircraft type. The water temp is
automotive. Its anyone's guess how accurate it is. The sensors
aren't real expensive, so I may just order another one, and see what I
get.
The engine doesn't seem to be really hot when I land, which also makes
me wonder about the accuracy.
With that said, I
also think that my air flow through the oil cooler is a little on the low
side. I don't want to rob any more form the coolant side, so another
scoop seems to be the answer.
Steve
Steve, can’t you put the
sender in boiling water and see what do you read? Many gauges have adjustments
on the back and you can compensate if the reading is
off.
bulent
Steve
–
Make sure you do this
(hot water test) while the sender and gauge are attached in the plane. If
there is a “ground loop” problem (i.e. significant difference in resistance
between sender to ground and gauge to ground) you might be getting an error
that way too. If you test them out of the plane they may check out OK but in
the plane they may have this additional error.
Just a
thot!
Joe
Hull
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