---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 10/19/08: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 03:54:46 PM PST US Subject: Yak-List: Yak/CJ temp probes and pressure sending units From: "keithmckinley" 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 _____________________________________ Time: 04:53:16 PM PST US From: "Frank Stelwagon" Subject: Re: Yak-List: 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" Sent: Sunday, October 19, 2008 3:54 PM Subject: Yak-List: 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 3 _____________________________________ Time: 05:09:22 PM PST US Subject: Yak-List: Re: Yak/CJ temp probes and pressure sending units From: "keithmckinley" 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 _____________________________________ Time: 05:40:23 PM PST US From: "Frank Stelwagon" Subject: Re: Yak-List: 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" Sent: Sunday, October 19, 2008 5:09 PM Subject: Yak-List: 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 5 _____________________________________ Time: 05:53:26 PM PST US Subject: Yak-List: Re: Yak/CJ temp probes and pressure sending units From: "keithmckinley" 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 _____________________________________ Time: 08:16:11 PM PST US From: "Mark Davis" 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 ________________________________ Message 7 _____________________________________ Time: 11:14:16 PM PST US Subject: RE: Yak-List: Shell smoke oils From: "John Cox" 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.