Today's Message Index:
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1. 02:18 AM - Re: Evans Coolant and SB-912-043-R2 (Gilles Thesee)
2. 06:00 AM - Re: Evans Coolant and SB-912-043-R2 (Thom Riddle)
3. 01:07 PM - Re: Evans Coolant and SB-912-043-R2 (D Wysong)
4. 01:35 PM - Re: Re: Evans Coolant and SB-912-043-R2 (Bruce Johnson)
Message 1
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| Subject: | Re: Evans Coolant and SB-912-043-R2 |
> I think that I am required to either switch to Evans, or install a water temperature
gauge in order to keep using 50/50 mix of water and glyco antifreeze.
>
Tommy,
You read the Rotax SB right.
As you may have understood from my message or website, I'm not a great
advocate of Evans ;-)
As William pointed out, there is a third means of complying, that is
measuring the coolant temp, and marking the CHT gauge accordingly.
Regards,
Gilles
http://contrails.free.fr
Message 2
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| Subject: | Re: Evans Coolant and SB-912-043-R2 |
I agree with Giles' interpretation of SB-912-043 R2. Although our CHT
has never been above 225F we are obligated to comply with this SB. I do
not like the idea of having a non-standard coolant when I am on
cross-country flights. I want to be able to add standard ethylene
glycol coolant if needed wherever I am. Since we do not have an
overheating problem, we are going to stay with the ethylene glycol,
change to the 1.2 BAR cap, and add the water temperature gauge. Flying
under an experimental airworthiness certificate does not strictly
require conformance but our SLSA airworthiness certificate requires us
to conform to all SBs or risk losing the SLSA a/w certificate. Besides,
I think Rotax knows what they are talking about, notwithstanding Phil
Lockwood's interpretation. Note also that the latest version of this SB
is dated well over a year after Phil Lockwood's article published in
Jan 2005.
Thom in Buffalo
Message 3
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| Subject: | Re: Evans Coolant and SB-912-043-R2 |
Thanks for the background info on the 'zero-pressure' cap, Ron. We're
running the stock cap (with new/improved sticker) on our 914, too. No
problems thus far.
D
Time: 11:29:30 AM PST US
> Subject: Re: RotaxEngines-List: Re: Evans Coolant and SB-912-043-R2
> From: <rparigor@suffolk.lib.ny.us>
>
> Hello D
>
> "Evans says you can go to a zero-pressure cap if using their fluid."
>
> Sometimes you need to know the whole story. It is true Evans says you can
> run a zero pressure cap, but they also tell you that the cap needs to be
> on the suction side of the pump. Rotax is not on the suction side. They
> also want you to help out with the lower thermal conductivity of their
> fluid compared to 50/50 by increasing pump volume or increase surface area
> of radiator, and want not too much restriction in the radiator itself.
>
> This is from the mouth of their research guy.
>
> I am going to run a .9 on my 914.
>
> Ron P.
>
Message 4
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| Subject: | Re: Evans Coolant and SB-912-043-R2 |
BE CAREFUL FLYING WITH THE EVANS IN HOT WEATHER!!!!
My Dad and I put it in our StingSport w/912s before flying to Osh last year
and experienced vapor lock (yes with AvGas) in 88 degree weather in approx
8000 ft density altitude....
The Evans will run approx 35-50+ degrees hotter, which will not harm the
engine, but in our case raised the under cowl temps enough to begin to boil
the fuel in the lines!....
After much fiddling, we put the regular coolant back in the next morning and
pressed on with no problems....
Perhaps our Sting does not have proper baffling to keep the under-cowl temps
down, but in our case the change to Evans almost proved deadly.....
-Bruce
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com]On Behalf Of Tommy
Walker
Sent: Saturday, January 13, 2007 5:30 PM
Subject: RotaxEngines-List: Re: Evans Coolant and SB-912-043-R2
<twalker@cableone.net>
Thanks all, that's a lot of good information. I have the .9 bar cap and I'm
going to use it.
This just occurred to me. Will the Evans coolant boil? I have my expansion
tank in line, but am not sure if it will be needed.
Thanks,
Tommy Walker in Alabama
--------
Tommy Walker
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=87417#87417
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