Today's Message Index:
----------------------
1. 08:56 AM - Re: Substituting 020 for 016 (river1)
2. 03:43 PM - EGT probe locations for 912S with Zenith exhaust? (jf3sb)
3. 06:54 PM - Re: EGT probe locations for 912S with Zenith exhaust? (Mark Sherman)
Message 1
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| Subject: | Re: Substituting 020 for 016 |
"That short 701 wing was originally designed for a much lighter 701, with a 2-stroke
engine".
Amen!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=289323#289323
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| Subject: | EGT probe locations for 912S with Zenith exhaust? |
Here's a question that I see has come up a couple times before in the archives
but without answers, so I'll try again...
I want to mount a couple of Dynon's "hose-clamp" style EGT probes on the headers
of the back two cylinders on a 912S on my 701 project with Zenith-furnished
exhaust system. The Rotax installation manual calls for them to be placed 70mm
behind the header socket flange, but placing them there puts them on a curved
part of the header. Anybody on the list been down this road before and have
any recommendations?
Also any opinions from the folks who are flying on how useful EGT monitoring is
on this engine? I like the idea of having EGT data, but am not particularly
keen on inviting exhaust leaks to get it unless it serves a purpose.
John
CH701
Olathe, KS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=289344#289344
Message 3
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| Subject: | Re: EGT probe locations for 912S with Zenith exhaust? |
John.
I have four EGT probes on my 912ULS. All are of the hose clamp type. I
have 80 hours on them and am doing my annual inspection this week and don't
see any leaking around the clamp.
EGT on a Rotax 912 is information only. You don't have a mixture control on
a Rotax, so there is nothing you can do to change the EGT temp. You could
pull the carb apart and change the needle setting if it was always lean or
rich, but Rotax has it pretty well dialed in from the factory. It will tell
you if you have a vacuum leak or some other problem on one side and not the
other.
The back two cylinders run about 150 degrees hotter than the front two.
Same with the CHT, back runs hotter than front.
Mark S.
701/912ULS
----- Original Message -----
From: "jf3sb" <jf3sb@yahoo.com>
Sent: Friday, March 05, 2010 3:41 PM
Subject: Zenith701801-List: EGT probe locations for 912S with Zenith
exhaust?
>
> Here's a question that I see has come up a couple times before in the
> archives but without answers, so I'll try again...
>
> I want to mount a couple of Dynon's "hose-clamp" style EGT probes on the
> headers of the back two cylinders on a 912S on my 701 project with
> Zenith-furnished exhaust system. The Rotax installation manual calls for
> them to be placed 70mm behind the header socket flange, but placing them
> there puts them on a curved part of the header. Anybody on the list been
> down this road before and have any recommendations?
>
> Also any opinions from the folks who are flying on how useful EGT
> monitoring is on this engine? I like the idea of having EGT data, but am
> not particularly keen on inviting exhaust leaks to get it unless it serves
> a purpose.
>
> John
> CH701
> Olathe, KS
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=289344#289344
>
>
>
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