Today's Message Index:
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1. 03:41 PM - Changing Coolant (michael baker)
2. 06:09 PM - Re: Changing Coolant (Hugh)
3. 06:47 PM - Re: Changing Coolant (GTH)
4. 07:57 PM - setting prop pitch (Ben Burbridge)
5. 11:23 PM - Re: setting prop pitch (Roger Lee)
6. 11:34 PM - Re: Changing Coolant (Roger Lee)
Message 1
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| Subject: | Changing Coolant |
I am changing coolant in my 912UL from Evans+ to Antifreeze. Has
anyone changed the the fluid in their airplane from Evans to
Antifreeze. Any suggestion as to how much to flush the system prior
to filling with Antifreeze, also what brand of Antifreeze do they
recommend.
Thanks, Mike
Message 2
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| Subject: | Changing Coolant |
Mike:
I don't know how much you have to flush the system before filling with 50/50
(water/antifreeze mix), but I do know that the mix should use distilled
water with the orange color antifreeze. Don't use the green antifreeze
because it is not compatible with aluminum.
Hugh McKay
Allegro 2000
Rotax 912 UL
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of michael
baker
Sent: Friday, October 31, 2008 5:38 PM
Subject: RotaxEngines-List: Changing Coolant
I am changing coolant in my 912UL from Evans+ to Antifreeze. Has
anyone changed the the fluid in their airplane from Evans to
Antifreeze. Any suggestion as to how much to flush the system prior
to filling with Antifreeze, also what brand of Antifreeze do they
recommend.
Thanks, Mike
Checked by AVG - http://www.avg.com
8:22 AM
Message 3
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| Subject: | Re: Changing Coolant |
michael baker a crit :
>
> I am changing coolant in my 912UL from Evans+ to Antifreeze. Has
> anyone changed the the fluid in their airplane from Evans to
> Antifreeze. Any suggestion as to how much to flush the system prior to
> filling with Antifreeze,mix.
Michael,
There is no real need to flush the cooling system after using Evans +.
It is mainly propylene glycol, which mixes nicely with water. By the
way, there is no problem with adding water to Evans+. What happens is
just that any amount of water will tend to lower the advertised higher
boiling point of pure Evans.
Ordinary 50/50 mix contains ethylene glycol. No problem with traces of
Evans in 50/50 .
> also what brand of Antifreeze do they recommend.
See SI 912 016 R1 on the Rotax owner website
http://www.rotax-owner.com/si_tb_info/serviceinfo/si-912-016r1.pdf
Best regards,
--
Gilles
http://contrails.free.fr
Message 4
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| Subject: | setting prop pitch |
I have a 912UL with a two-blade Warp Drive prop, and am not getting
static rpm of 5,200. I am about to re-set the pitch, and can't
remember the recommended degrees of pitch. Does anybody know?
Thanks. Ben
Message 5
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| Subject: | Re: setting prop pitch |
Hi Ben,
You don't really care what the recommended pitch is except for maybe the first
time to get you in the ballpark for rpm. You want to set your prop so your engine
turns 5500 WOT flat and level at the general altitude that you normally fly.
I never worry or even bother with static rpm. I know what to add or remove
in pitch if you tell me what you are currently running WOT at your average altitude.
5500 WOT is the best all around compromise for your ground adjustable prop
and Rotax 912ULS engine combo. I only set it different for special circumstances
and flight characteristics. I have a 3 blade Warp Drive.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=211443#211443
Message 6
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| Subject: | Re: Changing Coolant |
I think you will find most anti freezes are good for aluminum now days. Just read
the jug it will tell you for sure. Most engine cooling systems now days have
aluminum in them some more than others.
I changed back from Evans to 50/50 because of the increase in temps (30F) on my
particular plane. I used Evans last 912 and it was fine because my engine was
more exposed and cooling was a little better. I do like Evans I just have a temp
problem in my plane with it.
I pop the lowest hose off the system and and put my hand over the fill spout on
the coolant and blow down through the system. This gets most of it out. Like
mentioned above you really don't need to get all the Evans out. It has the same
make up as a lot of antifreeze's just no water.
When you go back to 50/50 you need to lower your max coolant temp to 248F. If you
don't have a coolant gauge then watch the CHT temps as they are very close.
You never said why you wanted to change? If you don't have a temp issue why change.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=211444#211444
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