Today's Message Index:
----------------------
1. 10:32 AM - How to bench test EGT and CHT sender units (Jim ODay)
2. 11:37 AM - Size of Coolant radiator for 912UL (michael baker)
3. 12:20 PM - Re: Size of Coolant radiator for 912UL (Ivan)
4. 12:28 PM - Re: Size of Coolant radiator for 912UL (rampil)
5. 04:08 PM - Re: Size of Coolant radiator for 912UL (Hugh)
Message 1
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| Subject: | How to bench test EGT and CHT sender units |
477 Rotax
How do I test an EGT and CHT sender w/o running the engine? Before I wreck something
I thought I should inquire. I could not find and help using the search.
Thanks.
Jim
--------
Jim O'Day
Fargo, ND
Firestar II
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=183551#183551
Message 2
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| Subject: | Size of Coolant radiator for 912UL |
Recent test flights indicate very high CHTs on my 912UL. I am
wondering if
a larger size coolant radiator would help lower the temps. Presently
using
Evans + coolant. What size rad are others using and where did you
purchase the rad.
Thanks, Mike
Message 3
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| Subject: | Re: Size of Coolant radiator for 912UL |
On my Trike UL with the same engine I just put a small metal flange scoop at
the radiator intake and it cools the water temp down nicely.
Ivan
Phoenix, AZ
----- Original Message -----
From: "michael baker" <mbee1@mac.com>
Sent: Saturday, May 17, 2008 11:33 AM
Subject: RotaxEngines-List: Size of Coolant radiator for 912UL
>
> Recent test flights indicate very high CHTs on my 912UL. I am wondering
> if
> a larger size coolant radiator would help lower the temps. Presently
> using
> Evans + coolant. What size rad are others using and where did you
> purchase the rad.
>
> Thanks, Mike
>
>
>
Message 4
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| Subject: | Re: Size of Coolant radiator for 912UL |
Mike,
CHTs with Evans are supposed to be higher than with water-based
coolant. That said, most people get by with the Europa-supplied
radiator. Some easy ways to improve its efficiency:
Force more ducted air through the radiator by either raising the
floor of the cowl towards the radiator (many start with a 2-3 inch
gap) or by putting an Aluminum plate on the bottom of the oil radiator
to force more air through both
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=183562#183562
Message 5
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| Subject: | Size of Coolant radiator for 912UL |
Mike: I don't know what radiator configuration you have, or where your
radiator is located. The Rotax 912 UL Installation manual suggests a minimum
area of 500 square centimeters (78 sq. in.). Every installation is
different. I have an Allegro 2000 with a 912 UL engine, and a radiator with
an area of 420 sq. cm. The location of my radiator is behind and beneath the
engine and is in a horizontal position. Not a good position in my opinion,
but that is the only practical place for it on my plane. I run a 50/50
water/glycol mixture as my coolant. My engine is fully coweled with very
little ram air area around the OD of the spinner. With this configuration I
have to be careful not to sit on the ground very long on a hot summer day
here in the Carolinas with my engine running, or my CHT will quickly get
into the yellow. However, once I am airborne I have no problem with the CHT
temp.
You can get this same radiator, together with the required expansion tank,
and overflow bottle from Lockwood Aviation Supply in Sebring, FL. If your
radiator does not have at least 420 sq. cm. of frontal area, you should get
a radiator with at least that much area.
Hugh McKay
Allegro 2000
912 UL
661WW
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of michael
baker
Sent: Saturday, May 17, 2008 2:34 PM
Subject: RotaxEngines-List: Size of Coolant radiator for 912UL
Recent test flights indicate very high CHTs on my 912UL. I am
wondering if
a larger size coolant radiator would help lower the temps. Presently
using
Evans + coolant. What size rad are others using and where did you
purchase the rad.
Thanks, Mike
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