Norman CYYJ
Well Known Member
Where is the best place to mount an OAT on an RV4?
Where is the best place to mount an OAT on an RV4?
I initially installed my Dynon OAT probe there as well. It was always a few degrees out when flying. I was told that Dynon has compensation for ram effect so the probe is supposed to be exposed to the airstream. I relocated it to the side of the fuselage about 4" under the stab and it has always been accurate since (when compared to a few others in flight).
Might depend on your probe/EFIS manufacturer.
There are a lot of options.
Probably the worst two places are in the NACA vent and just behind the firewall.
I put both of mine in the last bulkhead, under the leading edge of the VS. as soon as air starts moving through that area, the temps stabilize after sitting in the hot sun.
(Click to enlarge)
Rob, do you have a photo of your oat sensor installation?On my -6, I put it one bay ahead of the inspection cover under the horizontal stab. Had good access to it with the stab fairing removed, and backup access through the inspection cover if needed. Keeps it out of the sun on hot days.
I mounted mine on the bottom of the wing to fuselage fairing. Easy to get to, not much wire, and it always matches the awos.
I don't think so, but I could take one. It's essentially the same place as the photo of the Red RV earlier in the thread. Below and behind the leading edge of the HS.Rob, do you have a photo of your oat sensor installation?
Did you feed it fresh air? That is where i ended up putting mine and unless it is in the hangar for the first flight of the day it is way off. Outside, in flight it reads 20F high...I will likely move it to the aileron bell crank inspection panel when I get around to it.
The most non-sensical yet wonderful option that I went with was from Stein! They said mount it under the wing root fairing, that plenty of air gets in there and it's protected from sunlight, and it works great! Short cable run and nothing to bump into, I went right out of the bay in front of the spar where the fuel tank line comes into the fuselage. YMMV, but it works great for Stein and me too!
Fitz