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Engine Baffling

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7suds(at)Chartermi.net
Guest

Posted: Sun Feb 13, 2011 3:11 pm Post subject: Engine Baffling

Guys,

I am working on installing the cowl baffling in my series 5 Outback with a

912 engine, stock exhaust and stock coolant radiator, (no oil cooler).

Wondering what your experiences have been running the stock baffling as

described in the manual, is it the best way to go? Have people found they

needed more, less, different install techniques, added rubber skirting, etc,

etc. 

For those that can post, some pictures of what you have put in your machine

and how it is working  for you would be great.

Thanks,

Lloyd Cudnohufsky

Model 5 Rebuild 912 IVO IFA

Northern Michigan  



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lcfitt(at)sbcglobal.net
Guest

Posted: Sun Feb 13, 2011 4:00 pm Post subject: Engine Baffling

Lloyd,



Check your install manual and see if it is for the 912.  I don't think I 

have ever seen a 912 install with baffling.  I am working on a Model IV and 

a Series V with 7 firewall forward and no mention of baffling in either 

manual.



Lowell



--------------------------------------------------

From: "Lloyd & Lorrie Cudnohufsky" <7suds(at)Chartermi.net>

Sent: Sunday, February 13, 2011 3:07 PM

To: <kitfox-list(at)matronics.com>

Subject: Engine Baffling



[quote] 

 <7suds(at)chartermi.net>



 Guys,

 I am working on installing the cowl baffling in my series 5 Outback with a

 912 engine, stock exhaust and stock coolant radiator, (no oil cooler).

 Wondering what your experiences have been running the stock baffling as

 described in the manual, is it the best way to go? Have people found they

 needed more, less, different install techniques, added rubber skirting, 

 etc,

 etc.

 For those that can post, some pictures of what you have put in your 

 machine

 and how it is working  for you would be great.

 Thanks,

 Lloyd Cudnohufsky

 Model 5 Rebuild 912 IVO IFA

 Northern Michigan



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7suds(at)Chartermi.net
Guest

Posted: Mon Feb 14, 2011 6:06 pm Post subject: Engine Baffling

Lowell,

Yes, the install manual shows it and for a 912, but perhaps I am leading

people astray by using the wrong words to describe what I am talking about.

I am calling the aluminum sheeting that is from the firewall to the radiator

and along the sides of the radiator as the baffling. I believe what is being

accomplished is to force the air coming in the front of the cowl through the

radiator by making the radiator the only path to the cowl exit. I know that

on an air cooled Lycoming there is baffling between and around the jugs to

force the air through the cooling fins, not sure if it is necessary on the

912, but the lower sheet makes sense otherwise I can see the air path

flowing around the radiator instead of through it. 



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lcfitt(at)sbcglobal.net
Guest

Posted: Mon Feb 14, 2011 7:49 pm Post subject: Engine Baffling

LLoyd,



Clear now.  I am helping with a Series 5, but it has the 7 firewall forward 

set-up and the baffling

is in front of the radiator as there is a NACA scoop on the bottom of the 

cowl that feeds the radiator, so can't be of much help - sorry.  I do have 

one concern on our set-up, however.  The area of the radiator / NACA scoop 

plus the cowl vent below the prop is about 125 sq. in.  The outlet at the 

base of the firewall is probably close to 100 inches.  Does anyone recall 

the ratio outlet vs. inlet.  As I recall, it should be in the 150% range, 

but  not sure.



Lowell



--------------------------------------------------

From: "Lloyd & Lorrie Cudnohufsky" <7suds(at)Chartermi.net>

Sent: Monday, February 14, 2011 6:03 PM

To: <kitfox-list(at)matronics.com>

Subject: RE: Engine Baffling



[quote] 

 <7suds(at)chartermi.net>



 Lowell,

 Yes, the install manual shows it and for a 912, but perhaps I am leading

 people astray by using the wrong words to describe what I am talking 

 about.

 I am calling the aluminum sheeting that is from the firewall to the 

 radiator

 and along the sides of the radiator as the baffling. I believe what is 

 being

 accomplished is to force the air coming in the front of the cowl through 

 the

 radiator by making the radiator the only path to the cowl exit. I know 

 that

 on an air cooled Lycoming there is baffling between and around the jugs to

 force the air through the cooling fins, not sure if it is necessary on the

 912, but the lower sheet makes sense otherwise I can see the air path

 flowing around the radiator instead of through it.



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propellerdesign(at)tele2.
Guest

Posted: Mon Feb 14, 2011 9:17 pm Post subject: Engine Baffling

HI



80% out is good on a water cooler of good shape ducting, if it is bad shaped 

110-150% is said to be "optimum"



Jan

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Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Mon Feb 14, 2011 10:25 pm Post subject: Engine Baffling

On 2/14/2011 7:45 PM, Lowell Fitt wrote:  	  Quote: 	
		  Does anyone recall the ratio outlet vs. inlet.  As I recall, it should be in the 150% range, but  not sure.   

 	
 

 Lowell,

     If you want to burn some hours spend some time with this radiator analysis software. Let me know if the attachment fails.

 

           Guy Buchanan   Normal   Guy Buchanan   8   20   2010-09-24T17:53:00Z   2011-01-02T22:52:00Z   1   25   149   1   1   173   14.00          <![endif]-->         59   Clean   Clean   false            false   false   false      EN-US   X-NONE   X-NONE                                             MicrosoftInternetExplorer4                                                   <![endif]-->                                                                                                                                                                                                                                                                                                                                                                                                                                <![endif]-->      /* Style Definitions */  table.MsoNormalTable 	{mso-style-name:"Table Normal"; 	mso-tstyle-rowband-size:0; 	mso-tstyle-colband-size:0; 	mso-style-noshow:yes; 	mso-style-priority:99; 	mso-style-parent:""; 	mso-padding-alt:0in 5.4pt 0in 5.4pt; 	mso-para-margin:0in; 	mso-para-margin-bottom:.0001pt; 	mso-pagination:widow-orphan; 	font-size:10.0pt; 	font-family:"Calibri","sans-serif"; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi;}  <![endif]-->   <![endif]-->       <![endif]-->Guy Buchanan

 Ramona, CA

 Kitfox IV-1200 / 592-C / Warp 3cs / 500 hrs. and grounded

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liquidcooling_912ul.xls

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liquidcooling_912ul.xls

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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

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