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James Missler
Joined: 14 Jan 2006
Posts: 8
Location: Bellevue, Ohio
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 Posted: Fri Feb 13, 2015 11:37 am Post subject: CHT sensor Installation |
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Regarding CHT sensor installation, has anyone tried connecting to the Allen key headed bolt between the spark plugs? Since my Ser. #22A976 Mod. 2200 does not have the pilot hole between the spark plugs as described in Procedure AVDALSR085-1 why not connect to this existing bolt. Since I already know my cylinders are running in the proper temp. range all I need to know is if there is a sudden change in any one or all of them. I'm not really concerned what the actual temp. is, just if there is a change. I of coarse would tighten the head bolt back to its proper torque. Any one have any thoughts on this. Also does anyone have information on installing Vortex generators on the wings and all tail surfaces?
Jim Missler
974 W. Main St.
Bellevue, Ohio 44811
419-271-4279
Installed in Kitfox III
100 Hrs. Total Time
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_________________
Jim Missler, Kitfox 3, Jabiru 2200, Prince P Tip Prop 64-28, Just plane fun. Bellevue, Ohio |
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matronics(at)rtist.nl
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| Posted: Fri Feb 13, 2015 12:17 pm Post subject: CHT sensor Installation |
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The issue with that is that the allen bolt is torqued to quite a high
tension. The CHT ring is made of soft copper, which will simply compress
and break when you properly torque that bolt. If the CHT ring does not
break right away, the bolt will gradually squeeze the soft copper and
will lose tension. That will cause blow-by.
I have the same old heads, and if you look down between the spark plugs,
there's an 8mm hole/cavity in the heads. I have obtained 8mm
thermocouple probes which snugly fit inside. I compared the readings
against the under-the-spark value and found about 40degC higher values.
Rob
On 2/13/2015 8:36 PM, James Missler wrote:
| Quote: |
Regarding CHT sensor installation, has anyone tried connecting to the Allen key headed bolt between the spark plugs? Since my Ser. #22A976 Mod. 2200 does not have the pilot hole between the spark plugs as described in Procedure AVDALSR085-1 why not connect to this existing bolt. Since I already know my cylinders are running in the proper temp. range all I need to know is if there is a sudden change in any one or all of them. I'm not really concerned what the actual temp. is, just if there is a change. I of coarse would tighten the head bolt back to its proper torque. Any one have any thoughts on this. Also does anyone have information on installing Vortex generators on the wings and all tail surfaces?
Jim Missler
974 W. Main St.
Bellevue, Ohio 44811
419-271-4279
Installed in Kitfox III
100 Hrs. Total Time
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| | - The Matronics JabiruEngine-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?JabiruEngine-List |
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Lynn Matteson
Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan
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| Posted: Sat Feb 14, 2015 8:18 am Post subject: CHT sensor Installation |
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Hi Jim-
I didn't have the hole either, so I drilled a hole in that area, as
described in someone's post quite a number of years ago....I don't
recall who it was. Anyway, I drilled a hole for a size #8 allen-
headed machine screw, tapped it, and installed a screw. Then I
removed that large spark plug lug, and fastened a #8 electrical lug
to the thermocouple lead. As I recall, I had to use a Dremel tool to
flatten the area where the hole is drilled. It's not a very hard job
to do, and it makes changing plugs a lot easier to boot, by not
having to unscrew the t'couple lug from the plugs.
Lynn Matteson
Kitfox IV Speedster, taildragger
JabiLynn 2200, #2062
Prince prop 64 x 30, P-tip
Electroair direct-fire ignition system
Rotec TBI-40 injection (sleeved to 36mm)
Status: flying with 1608 hrs... (since 3-27-2006)
On Feb 13, 2015, at 2:36 PM, James Missler wrote:
| Quote: |
<misslerfarms(at)msn.com>
Regarding CHT sensor installation, has anyone tried connecting to
the Allen key headed bolt between the spark plugs? Since my Ser.
#22A976 Mod. 2200 does not have the pilot hole between the spark
plugs as described in Procedure AVDALSR085-1 why not connect to
this existing bolt. Since I already know my cylinders are running
in the proper temp. range all I need to know is if there is a
sudden change in any one or all of them. I'm not really concerned
what the actual temp. is, just if there is a change. I of coarse
would tighten the head bolt back to its proper torque. Any one have
any thoughts on this. Also does anyone have information on
installing Vortex generators on the wings and all tail surfaces?
Jim Missler
974 W. Main St.
Bellevue, Ohio 44811
419-271-4279
Installed in Kitfox III
100 Hrs. Total Time
|
| | - The Matronics JabiruEngine-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?JabiruEngine-List |
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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM |
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jpm03loiret
Joined: 19 Feb 2015
Posts: 1
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| Posted: Fri Feb 20, 2015 9:56 am Post subject: Re: CHT sensor Installation |
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Hi,
last november, I try CHT sensor on bolt N°6 (Yes, I know it is not a good idea !)
I check tension 10 hours latter and it was OK
same readings than under the plugs 110/120°C (about 30/40°C under thermax clocks)
Dominque
http://jpm03loiret.free.fr
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