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Engine cooling Louver Vents

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jeffrey-j-paris(at)excite
Guest

Posted: Fri Jul 20, 2012 10:37 am Post 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

  [quote][b]

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aircraftspecialty(at)gmai
Guest

Posted: Fri Jul 20, 2012 11:12 am Post subject: Engine cooling Louver Vents

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 degrees and oil temperatures 10-15 degrees, depending on aircraft type and installation.

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 method 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 follow 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)> wrote:



[quote] 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

   	  Quote: 	
		  



===================================

tp://www.matronics.com/Navigator?Zenith-List

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cs.com

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matronics.com/contribution

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[b]

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larrycmcfarland(at)gmail.
Guest

Posted: Fri Jul 20, 2012 5:34 pm Post subject: 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 [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Jeffrey J Paris

Sent: Friday, July 20, 2012 1:36 PM

To: zenith-list(at)matronics.com; jabiruengine-list(at)matronics.com

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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  [quote][b]

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