Today's Message Index:
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1. 10:09 AM - Re: Official JabiruEngine-List Usage Guidelines (Bob Haas)
2. 11:02 AM - Re: Re: Gull Wing Mods (oldbldplt@aol.com)
Message 1
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| Subject: | Official JabiruEngine-List Usage Guidelines |
Why don't you publish a bound book?
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Matt
Dralle
Sent: Saturday, May 02, 2009 2:03 AM
Subject: JabiruEngine-List: Official JabiruEngine-List Usage Guidelines
Dear Listers,
Please read over the JabiruEngine-List Usage Guidelines below. The complete
JabiruEngine-List FAQ including these Usage Guidelines can be found at the
following URL:
http://www.matronics.com/FAQs/JabiruEngine-List.FAQ.html
Thank you,
Matt Dralle
Matronics Email List Administrator
****************************************************************************
**
JabiruEngine-List Usage Guidelines
****************************************************************************
**
The following details the official Usage Guidelines for the
JabiruEngine-List.
You are encouraged to read it carefully, and to abide by the rules therein.
Failure to use the JabiruEngine-List in the manner described below may
result
in the removal of the subscribers from the List.
JabiruEngine-List Policy Statement
The purpose of the JabiruEngine-List is to provide a forum of discussion for
things related to this particular discussion group. The List's goals
are to serve as an information resource to its members; to deliver
high-quality content; to provide moral support; to foster camaraderie
among its members; and to support safe operation. Reaching these goals
requires the participation and cooperation of each and every member of
the List. To this end, the following guidelines have been established:
- Please keep all posts related to the List at some level. Do not submit
posts concerning computer viruses, urban legends, random humor, long
lost buddies' phone numbers, etc. etc.
- THINK carefully before you write. Ask yourself if your post will be
relevant to everyone. If you have to wonder about that, DON'T send it.
- Remember that your post will be included for posterity in an archive
that is growing in size at an extraordinary rate. Try to be concise and
terse in your posts. Avoid overly wordy and lengthy posts and
responses.
- Keep your signature brief. Please include your name, email address,
aircraft type/tail number, and geographic location. A short line
about where you are in the building process is also nice. Avoid
bulky signatures with character graphics; they consume unnecessary
space in the archive.
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easily obtainable from other widely available sources. Consult the
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will hurt feelings, waste bandwidth and resolve nothing.
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List members promoting their respective products or items for sale
should be of a friendly, informal nature, and should not resemble
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is about sharing information and knowledge. This applies to
everyone, including those who provide products to the entire
community. Informal presentation and moderation should be the
operatives with respect to advertising on the Lists.
-------
[This is an automated posting.]
do not archive
Checked by AVG - www.avg.com
17:52:00
Message 2
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| Subject: | Re: Gull Wing Mods |
Hey John,
I'd love to see your pictures... sounds like a neat mod.? Please send to oldbldplt@aol.com
Thanks,? Marvin
-----Original Message-----
From: TELEDYNMCS@aol.com
Sent: Sat, 2 May 2009 5:50 am
Subject: JabiruEngine-List: Re: Gull Wing Mods
?
?
In a message dated 5/2/2009 3:08:12 A.M. Eastern Daylight Time,
jabiruengine-list@matronics.com writes:
Have you
done this mod????
?
Greetings,
?
I have a 3300 installed in a Europa. About two years ago I modified the
"gull wings" to include a hole in them about?one sq. in.?or so in
total area on each wing. The shape of the hole?resembles a pentagram with
the pointy side towards the crankcase.?This allows air to spill down the
inside of the heads and between the cylinder barrels. While the gull wing is not
completely removed, this modification?did help with lowering?head
temps in climb. I recall I?tested with the gull wings removed completely
and it did not help my set up.
?
Last fall I added a "step"? or reverse scoop to my lower cowl just
before the exit hole. This step, or reverse scoop, serves to create an area of
low pressure at the point where the cooling flow exits the lower cowl. The
effect is similar to the "lips" often seen on lower cowls, but is?more
aerodynamic. The step was molded onto the lower cowl by carefully shaping foam,
then glassing over it and painting. It extends about?4" below
the?lower cowl and belly of the aircraft and is approximately 10" wide,
equal to the width of the exit hole.?This helped significantly.
Essentially, what I did was copy what Mooney, Cirrus, Columbia and other
"modern" aircraft are doing in regard to their lower cowls to enhance exit
cooling flow. It also hides the exhaust stacks and helps to hide the Europa's
lower stainless firewall and nose gear leg gusset from the relative wind in
climb and cruise attitudes. Both the lower fire wall and nose gear leg gusset
were flat to the airflow in climb and somewhat exposed in cruise. Manometer
testing showed that these two components were causing an area of high pressure
at the exit hole prior to the installation of the step. The change in the gull
wings and the addition of the step on the lower cowl reduced the ambient
pressure inside the internal head cooling ducts, increasing flow, and lowering
head temps by an average of 25F. Pictures available upon request.
?
Regards,
?
John
Lawton
Whitwell, TN (TN89)
Europa N245E -
Flying
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