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 Posted: Mon Jul 23, 2012 4:51 pm Post subject: Zenith-List Digest: 3 Msgs - 07/20/12 |
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To: Zenith-List Digest List <zenith-list-digest(at)matronics.com>
Sent: Saturday, July 21, 2012 3:01 AM
Subject: Zenith-List Digest: 3 Msgs - 07/20/12
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Zenith-List Digest Archive
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Total Messages Posted Fri 07/20/12: 3
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Today's Message Index:
----------------------
1. 11:38 AM - Engine cooling Louver Vents (Jeffrey J Paris)
2. 12:12 PM - Re: Engine cooling Louver Vents (Steve T)
3. 06:34 PM - Re: Engine cooling Louver Vents (Larry McFarland)
________________________________ Message 1 _____________________________________
Time: 11:38:47 AM PST US
From: "Jeffrey J Paris" <jeffrey-j-paris(at)excite.com (jeffrey-j-paris(at)excite.com)>
Subject: Engine cooling Louver Vents
Gentlepeople,
=C2-
A few months ago someone out on our lists mentioned that they were using som
e louvered vents in an aid to cooling their Jabiru installation. =C2-I wou
ld be interested to see if anyone has some anecdotal or actual experience wi
th utilizing louvered vents on the bottom of a cowl in an effort to aid and
imnprove engine cooling.
=C2-
In my case I have a Jab3300 powered Zentith Zodiac in which I'm pretty much
dialed into in terms of cooling. =C2-However, I am also a builder of a Jab
3300 powered Europa Classic Monowheel and due to the fact =C2-that the fo
otwells and the main landing gear truncate the bottom opening of the cowl ma
king a clean and big enough exit a bit "messy".
=C2-
I am curious to see if a set of vented louvers running parallel and under ea
ch cylinder would create enough pull to enhance cooling?=C2-(Bonanzas have
em') =C2-Do the experts think I might have some luck with just such an in
stallation?
=C2-
Thanks for your time and consderation.
=C2-
Jeff Paris
________________________________ Message 2 _____________________________________
Time: 12:12:28 PM PST US
Subject: Re: Engine cooling Louver Vents
From: Steve T <aircraftspecialty(at)gmail.com (aircraftspecialty(at)gmail.com)>
Jeff....
Good afternoon. I was involved with the cooling louvers discussion and have
sold several sets to zenith aircraft builders and owners.
Typically, cooling louvers will decrease your cht temperatures by 20-35 degr
ees and oil temperatures 10-15 degrees, depending on aircraft type and insta
llation.
The louver placement can make a big difference in actual efficiency. But we
have found them to be a very efficient, lightweight and cost effective meth
od to help with high temperatures.
A lot of rv aircraft use them and have even better results due to the higher
airspeed. I have a set in a 701 with a corvair engine and he is reporting a
20-25 degree drop in cht.
If you are interested, they can be found at
http://aircraftspecialty.com/zenithproducts.html
We manufacture them in house to keep costs low and also to ensure quality.
I am an aircraft builder and am picky about what I put on my airplane, and f
ollow through with that mindset for our customers.
Have a great day
Steve
Sent from my iPhone
Sent from my iPhone
On Jul 20, 2012, at 13:36, "Jeffrey J Paris" <jeffrey-j-paris(at)excite.com (jeffrey-j-paris(at)excite.com)> wr
ote:
| Quote: | Gentlepeople,
A few months ago someone out on our lists mentioned that they were using s
ome louvered vents in an aid to cooling their Jabiru installation. I would b
|
e interested to see if anyone has some anecdotal or actual experience with u
tilizing louvered vents on the bottom of a cowl in an effort to aid and imnp
rove engine cooling.
| Quote: |
In my case I have a Jab3300 powered Zentith Zodiac in which I'm pretty muc
h dialed into in terms of cooling. However, I am also a builder of a Jab 33
|
00 powered Europa Classic Monowheel and due to the fact that the footwells a
nd the main landing gear truncate the bottom opening of the cowl making a cl
ean and big enough exit a bit "messy".
| Quote: |
I am curious to see if a set of vented louvers running parallel and under e
ach cylinder would create enough pull to enhance cooling? (Bonanzas have em'
|
) Do the experts think I might have some luck with just such an installatio
n?
| Quote: |
Thanks for your time and consderation.
Jeff Paris
==========================
|
=========
==========================
=========
==========================
=========
==========================
=========
________________________________ Message 3 _____________________________________
Time: 06:34:16 PM PST US
From: "Larry McFarland" <larrycmcfarland(at)gmail.com (larrycmcfarland(at)gmail.com)>
Subject: RE: Engine cooling Louver Vents
Hi Jeff,
I used louvers under my belly radiator installation, did a tissue test
to proof the negative draft and it worked really well.
No major numbers, but about a 5 degree improvement overall for radiator
cooling.
http://www.macsmachine.com/images/subaruengine/full/louvertuftest2.gif
Larry McFarland
From: owner-zenith-list-server(at)matronics.com (owner-zenith-list-server(at)matronics.com)
[mailto:owner-zenith-list-server(at)matronics.com (owner-zenith-list-server(at)matronics.com)] On Behalf Of Jeffrey J
Paris
Sent: Friday, July 20, 2012 1:36 PM
Subject: Engine cooling Louver Vents
Gentlepeople,
A few months ago someone out on our lists mentioned that they were using
some louvered vents in an aid to cooling their Jabiru installation. I
would be interested to see if anyone has some anecdotal or actual
experience with utilizing louvered vents on the bottom of a cowl in an
effort to aid and imnprove engine cooling.
In my case I have a Jab3300 powered Zentith Zodiac in which I'm pretty
much dialed into in terms of cooling. However, I am also a builder of a
Jab 3300 powered Europa Classic Monowheel and due to the fact that the
footwells and the main landing gear truncate the bottom opening of the
cowl making a clean and big enough exit a bit "messy".
I am curious to see if a set of vented louvers running parallel and
under each cylinder would create enough pull to enhance cooling?
(Bonanzas have em') Do the experts think I might have some luck with
just such an installation?
Thanks for your time and consderation.
Jeff Paris
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