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912S/ oil cooler efficiency

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fredshiple(at)sbcglobal.n
Guest

Posted: Tue May 09, 2006 5:55 pm Post subject: 912S/ oil cooler efficiency

I've a question regarding oil cooler efficiency on a Kitfox with a 912S:

My Series 6/ 912S was built with the Skystar optional oil cooler. During the past two summers at temps over 95F I'd have to lower the nose after talk off/climb after about 1 to 1 1/2 minutes as oil temp reached 260F (red line 266F). At 100F (a rare occurance in NW Ohio) had to throttle back from 75% to 65% for the same reason.

Now that I'm flying on floats, I've begun to see the same thing at 75-80 degrees. I'm flying 12-15 mph slower  (at the same rpm/manifold pressures) as anticipated with the extra drag. The water and cylinder head temps have remained well in the green with or without the floats.  I saw temps consistant with prior years operations in the month prior to install of the floats two weeks ago.

Any advice is appreciated as I'm now concerned about warmer weather operation.

Fred

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kingjohne(at)adelphia.net
Guest

Posted: Tue May 09, 2006 6:26 pm Post subject: 912S/ oil cooler efficiency

Fred,



I have a Series 6 powered by a 912S and haven't had excessively high oil 

temperatures in hot weather.  Have you calibrated your oil temperature 

sensor against a standard or accurate gauge?  Send me a picture of your 

oil cooler inlet on the cowling. and the dimensions of the oil cooler.  

I'll make a comparison with mine and send you a picture of my configuration.



-- 

John King 

Warrenton, VA

Fred Shiple wrote:



 	  Quote: 	
		  



I've a question regarding oil cooler efficiency on a Kitfox with a 912S:

My Series 6/ 912S was built with the Skystar optional oil cooler. During the past two summers at temps over 95F I'd have to lower the nose after talk off/climb after about 1 to 1 1/2 minutes as oil temp reached 260F (red line 266F). At 100F (a rare occurance in NW Ohio) had to throttle back from 75% to 65% for the same reason.

Now that I'm flying on floats, I've begun to see the same thing at 75-80 degrees. I'm flying 12-15 mph slower  (at the same rpm/manifold pressures) as anticipated with the extra drag. The water and cylinder head temps have remained well in the green with or without the floats.  I saw temps consistant with prior years operations in the month prior to install of the floats two weeks ago.

Any advice is appreciated as I'm now concerned about warmer weather operation.

Fred

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fredshiple(at)sbcglobal.n
Guest

Posted: Tue May 09, 2006 7:23 pm Post subject: 912S/ oil cooler efficiency

John,

I calibrated it two years ago when it was installed (boiling water). Will get picks and measurements to you tomorrow.

Fred



temperatures in hot weather.  Have you calibrated your oil temperaturesensor against a standard or accurate gauge?  Send me a picture of your

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morid(at)northland.lib.mi
Guest

Posted: Wed May 10, 2006 3:40 am Post subject: 912S/ oil cooler efficiency

I can't help with the oil temps Fred, but congrats on getting the floats in

the air.  How's the teething process going?

Deke



---

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fredshiple(at)sbcglobal.n
Guest

Posted: Wed May 10, 2006 7:11 am Post subject: 912S/ oil cooler efficiency

Hi, Deke,

  The plane/floats are flying well. The pilots doing better . A Kitfox on floats is as much fun as I've ever  had flying. I'll get some pictures on the site once I get the trim painted- too busy flying now.

  Fred

I can't help with the oil temps Fred, but congrats on getting the floats in

the air. How's the teething process going?

Deke

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fredshiple(at)sbcglobal.n
Guest

Posted: Thu May 11, 2006 3:42 pm Post subject: 912S/ oil cooler efficiency

John, 

 The cooler measures 3"x6 1/2" by 2" deep. The inlet is 2"x6  1/2". I calibrated the  sensor and cooler in a boiling water bath  as I had no other sensor available. Have included the photos of the  installation.

  We're visiting our adult children in San Francisco this week-end so my internet access may be limited. 

  I hope you're flying well. We met about 4 years ago at Oshkosh and you  were gratious enough to answer a lot of my installation questions.  Thanks for your help now. 

  Fred



  I have a Series 6 powered by a 912S and haven't had excessively high oil 

temperatures in hot weather.  Have y

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kingjohne(at)adelphia.net
Guest

Posted: Fri May 12, 2006 7:07 pm Post subject: 912S/ oil cooler efficiency

Fred,



Your e-mail included no pictures.  I am not at the airport now, so I 

cannot verify the measurements you provided, however, they look very 

similar.  Included are two pictures of my installation.  In the second 

picture the adjustable doors are not fully open.  The prop is my old 

PowerFin blades, before I installed the Proplink system that I still 

use.  If your installation is the same as mine, I cannot explain the 

differences in performance.  I calibrated my temperature sensors in 

heated cooking oil through the entire range of the sensor using a good 

reference thermometer.  My initial sensor was bad at the high end, so I 

replaced it.



-- 

John King 

Warrenton, VA

Fred Shiple wrote:



 	  Quote: 	
		  



John, 

 The cooler measures 3"x6 1/2" by 2" deep. The inlet is 2"x6  1/2". I calibrated the  sensor and cooler in a boiling water bath  as I had no other sensor available. Have included the photos of the  installation.

  We're visiting our adult children in San Francisco this week-end so my internet access may be limited. 

  I hope you're flying well. We met about 4 years ago at Oshkosh and you  were gratious enough to answer a lot of my installation questions.  Thanks for your help now. 

  Fred



  I have a Series 6 powered by a 912S and haven't had excessively high oil 

temperatures in hot weather.  Have y

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kingjohne(at)adelphia.net
Guest

Posted: Sat May 13, 2006 7:24 pm Post subject: 912S/ oil cooler efficiency

Fred,



Another question on your cooling problem.  What coolant do you use and 

what concentration?  What do you dilute it with?  I use Havoline 

Extended Life and dilute it 50/50 with distilled water



-- 



John King 

Warrenton, VA

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fredshiple(at)sbcglobal.n
Guest

Posted: Sun May 14, 2006 6:57 am Post subject: 912S/ oil cooler efficiency

John, 

  I use Honda's 50-50 premixed antifreeze. I'am having no problems with my water temps.

  I'm visiting my kids here in San Francisco, so if I don't get back to  you until Tuesday, it's because I don't always have internet access.

  Fred

  what concentration?  What do you dilute it with?  I use Havoline 

Extended Life and dilute it 50/50 with distilled water

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