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OAT sensor location

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albertakolbmk3

Joined: 13 Jun 2009
Posts: 69
Location: Innisfail, AB

Posted: Mon Jan 18, 2010 6:14 pm Post subject: OAT sensor location

Just getting my new GR EIS wired up and would like to know where others have put the OAT sensor on the plane (if your using it). I would think that out of sunlight and air movement would be best?

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Tony B.

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rickofudall

Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA

Posted: Mon Jan 18, 2010 6:53 pm Post subject: OAT sensor location

Tony, out of the moving air is not a problem for a sensor or thermometer. Wind chill isn't a factor since it gives an equivalent temperature on exposed skin, unless you're using one of those "red neck" type sensors. 



Rick Girard



On Mon, Jan 18, 2010 at 8:14 PM, albertakolbmk3 <cheriebraun(at)xplornet.com (cheriebraun(at)xplornet.com)> wrote:

[quote] --> Kolb-List message posted by: "albertakolbmk3" <cheriebraun(at)xplornet.com (cheriebraun(at)xplornet.com)>

 

 Just getting my new GR EIS wired up and would like to know where others have put the OAT sensor on the plane (if your using it). I would think that out of sunlight and air movement would be best?

 

 --------

 Tony B.

 

 Kolb MKIII C

 Rotax 582

 C Gearbox 3.00:1

 WD 66&quot; 3 Blade Prop

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=282165#282165

 

 

 

 

 

 

 

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albertakolbmk3

Joined: 13 Jun 2009
Posts: 69
Location: Innisfail, AB

Posted: Wed Jan 20, 2010 2:10 am Post subject: Re: OAT sensor location

Rick, could you elaborate on that a little more. Not sure what you mean when you say an equivalent temperature on exposed skin. The probe is about 1 inch long and about 1/4" diameter.  I have an existing hole just behind the passenger door. I was going to stick it through there and silicone it in. It would protrude about 1 inch.

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Kolb MKIII C
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WD 66" 3 Blade Prop

rickofudall

Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA

Posted: Wed Jan 20, 2010 2:34 am Post subject: OAT sensor location

From Wikipedia: Wind chill is the apparent temperature felt on exposed skin due to wind.

 



http://www.nws.noaa.gov/om/windchill/ 



[/url]Notice the various caveats about how the wind chill is determined, all relating to human skin. If your thermometer is dry, i.e. nothing to carry heat away, it does not know if the wind is blowing or not. Notice also the caveat about sunlight, this does relate to your thermometer since, like skin, the material the probe is made of will absorb radiant energy and that will effect the reading it displays.

 



Rick Girard 



On Wed, Jan 20, 2010 at 4:10 AM, albertakolbmk3 <cheriebraun(at)xplornet.com (cheriebraun(at)xplornet.com)> wrote:

 [quote]--> Kolb-List message posted by: "albertakolbmk3" <cheriebraun(at)xplornet.com (cheriebraun(at)xplornet.com)>

  

 Rick, could you elaborate on that a little more. Not sure what you mean when you say an equivalent temperature on exposed skin. The probe is about 1 inch long and about 1/4" diameter.  I have an existing hole just behind the passenger door. I was going to stick it through there and silicone it in. It would protrude about 1 inch.

  

 --------

 Tony B.

 

 Kolb MKIII C

 Rotax 582

 C Gearbox 3.00:1

 WD 66&quot; 3 Blade Prop

 

 

 

 

 Read this topic online here:

 

 [url=http://forums.matronics.com/viewtopic.php?p=282408#282408]http://forums.matronics.com/viewtopic.php?p=282408#282408

 

 

 

 

 

 

 

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Dana

Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA

Posted: Wed Jan 20, 2010 10:45 am Post subject: OAT sensor location

At 05:10 AM 1/20/2010, albertakolbmk3 wrote:

  	  Quote: 	
		  ... could you elaborate on that a little more. Not sure what you mean when you say an equivalent temperature on exposed skin. 	


 Wind chill only applies when you're talking about the temperature of a body that's hotter than the air... moving air draws heat away faster than still air so it seems colder.  There are also effects from evaporation of sweat.  



 A thermometer isn't heated internally, so it will be at the same temperature as the air so there is no wind chill effect... in fact if it's in fast moving air it will respond more quickly than if it was in still air.



 I would mount the thermometer anywhere that it won't get  bumped.



 -Dana

 

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