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  #1  
Old 06-24-2014, 08:44 AM
Dean Pichon Dean Pichon is offline
 
Join Date: May 2006
Posts: 544
Default OAT Probe Location Recommendation?

Hi,

I'm looking for recomendations for locating an OAT probe in my (flying) -4. I recently installed a D10A and would like to incorporate OAT capability. I'd like to find an accurate, minimally invasive, unobtrusive, and easy-to-wire location for the probe. (How hard can that be?) Thanks in advance for the help.

Dean
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  #2  
Old 06-24-2014, 08:56 AM
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vfrazier vfrazier is offline
 
Join Date: Jan 2007
Location: Mount Vernon, IN
Posts: 1,335
Default

Put it out in the wing somewhere. The air around the fuselage is always hotter than ambient, unless you're flying a Long-Eze. There was an 11 degree difference on my RV-4 and on my Rocket. This was measured in the fuselage NACA vents and wing roots, -vs- out in the wing near the bellcrank access access holes.

This is also a good reason to add underwing fresh air vents during construction.

Dean, if putting it out in the wing seems like too much trouble, just remember that bad data is worse than no data. Hopefully, your RV-4 has a wing conduit installed already!

YMMV.
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Last edited by vfrazier : 06-24-2014 at 08:59 AM.
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  #3  
Old 06-24-2014, 08:57 AM
Rodney Rodney is offline
 
Join Date: Oct 2012
Location: Friendswood, TX
Posts: 74
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I placed my Dynon OAT on the right side of the fuselage in the shade under the right elevator.
Seems to work well for me--on an RV-7A.
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  #4  
Old 06-24-2014, 09:47 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
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Quote:
Originally Posted by Rodney View Post
I placed my Dynon OAT on the right side of the fuselage in the shade under the right elevator.
Seems to work well for me--on an RV-7A.
I put mine here as well, but have not been in the air yet. My OAT is wired to the Dynon Magnetometer harness, so was placed here in part for convenience. Read many posts with folks using this location successfully.

Larry
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  #5  
Old 06-24-2014, 10:14 AM
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Toobuilder Toobuilder is offline
 
Join Date: Jul 2009
Location: Mojave
Posts: 4,776
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I have mine on the inspection panel just under the LE of the left HS. I did it on the inspection panel so that I could move it if it's seeing too much air from the cowl. So far, seems to be pretty accurate.
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  #6  
Old 06-24-2014, 10:29 AM
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Kahuna Kahuna is offline
 
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Location: Gold Hill, NC25
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What Vince said. At least a foot away from the fuse.
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  #7  
Old 06-24-2014, 10:43 AM
Steve Barnes Steve Barnes is offline
 
Join Date: Jul 2008
Location: Santa Rosa, CA
Posts: 583
Default quick and easy

On both my RV's I placed the probe behind the flap and tie wrapped it to the the lightening holes on the flap brace W421. Out of the sun and away from the fuselage and out of sight.

Steve
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  #8  
Old 06-24-2014, 10:49 AM
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N941WR N941WR is offline
 
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Location: SC
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Here you go:


(Click to enlarge)
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  #9  
Old 06-24-2014, 12:15 PM
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fl-mike fl-mike is offline
 
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Under the wing, just outboard of the aileron bellcrank inspection cover.
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  #10  
Old 06-24-2014, 12:41 PM
rightrudder rightrudder is offline
 
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Quote:
Originally Posted by N941WR View Post
Here you go:


(Click to enlarge)
I like that solution.
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