Today's Message Index:
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1. 03:54 PM - Yak/CJ temp probes and pressure sending units (keithmckinley)
2. 04:53 PM - Re: Yak/CJ temp probes and pressure sending units (Frank Stelwagon)
3. 05:09 PM - Re: Yak/CJ temp probes and pressure sending units (keithmckinley)
4. 05:40 PM - Re: Re: Yak/CJ temp probes and pressure sending units (Frank Stelwagon)
5. 05:53 PM - Re: Yak/CJ temp probes and pressure sending units (keithmckinley)
6. 08:16 PM - Shell smoke oils (Mark Davis)
7. 11:14 PM - Re: Shell smoke oils (John Cox)
Message 1
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| Subject: | Yak/CJ temp probes and pressure sending units |
Gents,
Purchased an MGL E-3 gauge for EGT purposes but is has the capability to add just
about every engine indication on the CJ
I've looked closely at the electrical schematics and had a volt/ohm meter on every
connection between the probes and gauge but for the life of me, I can't figure
out how the "trons" are flowing. The pressure input as well as oil temp to
the gauge is a single wire input with a common ground. EGT's and CHT's are straight
forward two wire connections. I'm sure it must be possible to use the
current oil temp sender and oil pressure sender but I'm not sure how.
I've attached the file for the unit if anyone is really bored.
Regards,
Keith McKinley
700HS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 9395#209395
Attachments:
http://forums.matronics.com//files/e3_445.pdf
Message 2
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| Subject: | Re: Yak/CJ temp probes and pressure sending units |
The original CJ oil temp is a thermocouple type gage the E-3 uses a
resistance sensor (resistance varies with temp), like Cessna's etc, it is a
single wire with the return being the engine case. The CJ pressure sensor
is also a two wire sensor then E-3 is looking for a variable resistance
sensor. Those can be found on cars and again Cessna's.
Frank
N23021
----- Original Message -----
From: "keithmckinley" <keith.mckinley@townisp.com>
Sent: Sunday, October 19, 2008 3:54 PM
Subject: Yak-List: Yak/CJ temp probes and pressure sending units
> <keith.mckinley@townisp.com>
>
> Gents,
>
> Purchased an MGL E-3 gauge for EGT purposes but is has the capability to
> add just about every engine indication on the CJ
>
> I've looked closely at the electrical schematics and had a volt/ohm meter
> on every connection between the probes and gauge but for the life of me, I
> can't figure out how the "trons" are flowing. The pressure input as well
> as oil temp to the gauge is a single wire input with a common ground.
> EGT's and CHT's are straight forward two wire connections. I'm sure it
> must be possible to use the current oil temp sender and oil pressure
> sender but I'm not sure how.
>
> I've attached the file for the unit if anyone is really bored.
>
> Regards,
> Keith McKinley
> 700HS
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 9395#209395
>
>
> Attachments:
>
> http://forums.matronics.com//files/e3_445.pdf
>
>
>
Message 3
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| Subject: | Re: Yak/CJ temp probes and pressure sending units |
Thanks for the reply Frank. I did notice that MGL makes an insert probe which can
be placed inside of a hollowed out CJ temp probe. As for the oil pressure sender,
I'd lack the motivation to re-do the fittings, lines and /or hoses to support
the standard thread on an auto/cessna sender.
Out of curiosity, how does the thermocouple sender work as opposed to the
resistance style sensor.
Keith
700HS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 9409#209409
Message 4
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| Subject: | Re: Yak/CJ temp probes and pressure sending units |
The thermocouple sender uses the junction of two dissimilar metals to
generate a voltage based on temperature, the voltage is quite small usually
in the milivolt range. The resistance style sensor varies the resistance
based on temperature. The gauge system usually supplies a constant voltage
to the resistor and as the resistance changes the current flow in the system
changes.
Frank
N23021
----- Original Message -----
From: "keithmckinley" <keith.mckinley@townisp.com>
Sent: Sunday, October 19, 2008 5:09 PM
Subject: Yak-List: Re: Yak/CJ temp probes and pressure sending units
> <keith.mckinley@townisp.com>
>
> Thanks for the reply Frank. I did notice that MGL makes an insert probe
> which can be placed inside of a hollowed out CJ temp probe. As for the oil
> pressure sender, I'd lack the motivation to re-do the fittings, lines and
> /or hoses to support the standard thread on an auto/cessna sender.
>
> Out of curiosity, how does the thermocouple sender work as opposed to the
> resistance style sensor.
>
> Keith
> 700HS
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 9409#209409
>
>
>
Message 5
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| Subject: | Re: Yak/CJ temp probes and pressure sending units |
I never leave this BB without becoming just a tad bit smarter!
Thanks for sharing your expertise Frank!
Keith
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 9414#209414
Message 6
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| Subject: | Shell smoke oils |
Does anyone have any experience with any of these smoke oils mentioned
on smokingairplanes.com? May be time to stock up again with the price
of oil down again.
Shell Carnea #10
Shell Carnea E-? (10 weight)
Shell VITREA 13
Mark Davis
N44YK
Message 7
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| Subject: | Shell smoke oils |
Yes, and a great way to obtain some is to contact your local airshow at
the conclusion of activities. They usually don't want to store it and
make it available for a song.
John Cox
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
Sent: Sunday, October 19, 2008 8:15 PM
Subject: Yak-List: Shell smoke oils
Does anyone have any experience with any of these smoke oils mentioned
on smokingairplanes.com? May be time to stock up again with the price
of oil down again.
Shell Carnea #10
Shell Carnea E-? (10 weight)
Shell VITREA 13
Mark Davis
N44YK
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