|
|
A coffee cup and an electric immersion heater will get you easily portable boiling water.
Jim
--- Original Message ---
From: "Steve Brooks" <prvt_pilot@yahoo.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: #$!%@$ temperatures still high
Re: [FlyRotary] Re: #$!%@$ temperatures still highJoe,
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
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Joe Hull
Sent: Wednesday, October 06, 2004 7:48 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: #$!%@$ temperatures still high
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
|
|