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  #11  
Old 06-24-2014, 02:49 PM
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RVbySDI RVbySDI is offline
 
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Originally Posted by rightrudder View Post
I like that solution.
The problem with that location is that it really isn't OUTSIDE. Once enclosed by the intersection fairing it will be INSIDE the tail cone. Perhaps it might be close to the actual outside air temperature but it will most likely receive some heat from being enclosed INSIDE the airplane. Putting it out near one of the wing access plates will get the probe OUTSIDE in the OUTSIDE AIR, it will be easily accessible from the access plate and it can be relatively easy to run wiring from that location into the fuselage and to the instrument.

These pics are not very good of my installation but you can see at the yellow circle where the OAT probe is installed just inboard of the first access plate in the left wing:


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  #12  
Old 06-24-2014, 03:12 PM
60av8tor 60av8tor is offline
 
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Originally Posted by RVbySDI View Post

These pics are not very good of my installation but you can see at the yellow circle where the OAT probe is installed just inboard of the first access plate in the left wing
Same location here - works great. Moved from NACA vent, which was not very good at all.
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  #13  
Old 06-24-2014, 05:17 PM
rightrudder rightrudder is offline
 
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Originally Posted by RVbySDI View Post
The problem with that location is that it really isn't OUTSIDE. Once enclosed by the intersection fairing it will be INSIDE the tail cone. Perhaps it might be close to the actual outside air temperature but it will most likely receive some heat from being enclosed INSIDE the airplane.
Yeah, I understand that?it partly depends on how "drafty" your empennage fairing is.
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  #14  
Old 06-24-2014, 06:05 PM
BillL BillL is offline
 
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Location: Central IL
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I know you want experience here, but I researched this and will be mounting my OAT in the wing root, L/S. After phase I, I might just mount some thermocouples and see how different positions compare, but that is later.

Good luck with your location.
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  #15  
Old 06-24-2014, 07:11 PM
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N941WR N941WR is offline
 
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Quote:
Originally Posted by rightrudder View Post
Quote:
Originally Posted by RVbySDI View Post
The problem with that location is that it really isn't OUTSIDE...
Yeah, I understand that…it partly depends on how "drafty" your empennage fairing is.
It is plenty drafty in that location and you don't have to worry about knocking if off when washing the plane.

When I first taxi out, it will read high, no surprise there, but by the time I'm climbing out, it matches the other planes I have flown with, within a degree or two, even on very cold days when I have the cabin heat on.

Also, my empennage fairing is very tight. There is just that much air going through our cockpits that it doesn't really matter.

Probably the worst place for the OAT probe is in the NACA vent.
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  #16  
Old 06-24-2014, 08:30 PM
jasman45 jasman45 is offline
 
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Location: San Antonio, TX
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we put our outside air temp on the inspection plate in the tail of the plane. It's out of the sun and far enough away from the engine to be accurate
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  #17  
Old 06-25-2014, 01:54 AM
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jeffk jeffk is offline
 
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Does anyone have any guidance as to accuracy of an OAT probe mounted inside the wing near the aileron bell crank vs mounted on the bottom of the wing in the slipstream?

Thanks,

Jeff
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  #18  
Old 06-25-2014, 09:29 AM
rightrudder rightrudder is offline
 
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Originally Posted by N941WR View Post
It is plenty drafty in that location and you don't have to worry about knocking if off when washing the plane.

When I first taxi out, it will read high, no surprise there, but by the time I'm climbing out, it matches the other planes I have flown with, within a degree or two, even on very cold days when I have the cabin heat on.

Also, my empennage fairing is very tight. There is just that much air going through our cockpits that it doesn't really matter.
Yes, a nice protected spot, straightforward wiring and no extra drag for the knots-obsessed. Me gusto mucho.
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