Where to install OAT gage?

[Doug Rohrer]

I recently purchased a flying RV-9A slider. I want to install a simple (non-electronic) OAT gage somewhere on the plane. Any advice on where/how to do it? I am thinking about drilling through the front canopy near the roll bar and letting the probe stick through, but I can't recall seeing this installation on any other RV's. Thanks.

[L.Adamson]

The (elec.) probes that have been placed in the NACA air scoops on the sides of the fusalage have been reading around 6 - 8 degrees high due to engine heat. The top of the cowl gets quite warm too; and I can imagine that some of that heat would be picked up by a probe on the canopy.

Mine (elec.) is under the wing, outboard the prop arc. Seems to do well.

L.Adamson --- RV6A

[db8]

Hey Doug. Found this similar link by doing a search: http://www.vansairforce.com/communit...&highlight=oat Dave

[N941WR]

Doug,

Welcome to the forum and to RV ownership.

Do a search on the subject, it comes every so often.

LA is correct, those installed in the NACA duct tend to read high.

Some have put them out in a wing inspection cover plate, other just out in the wing. In put mine in the aft most bulkhead, under the empennage fairing. Once you start moving, enough air goes through there that it reads accurately. I simply enlarged the tooling hole on the half round bulkhead.

FYI, you will have to remove a LOT of inspection covers to run the wires, regardless of the location you select. You might want to think about waiting until your next condition inspection to install this.

[hydroguy2]

Originally Posted by Doug Rohrer

......... I want to install a simple (non-electronic) OAT gage somewhere on the plane. .............

Doug, Can't help you with the location, but I'd be reluctant to drill the canopy for a OAT.

RTQ fella's. He's looking to mount a simple gage, sans wires.

[L.Adamson]

Originally Posted by hydroguy2

RTQ fella's. He's looking to mount a simple gage, sans wires.

I know. I just can't think of any place, that wouldn't be effected by engine heat, and readable at the same time.

L.Adamson --- RV6A

[N941WR]

Originally Posted by hydroguy2

RTQ fella's. He's looking to mount a simple gage, sans wires.

Brian,

Thanks, I missed that. I would hate to seem him drill the canopy for his OAT as the few I have seen done this way have cracked the canopy. This might be caused by the air loads, but I really don't know.

[Rick6a]

Originally Posted by Doug Rohrer

I recently purchased a flying RV-9A slider. I want to install a simple (non-electronic) OAT gage somewhere on the plane. Any advice on where/how to do it? I am thinking about drilling through the front canopy near the roll bar and letting the probe stick through, but I can't recall seeing this installation on any other RV's. Thanks.

I installed this type of remote OAT gauge behind me on the passenger side. With a flip of the toggle it displays either F° or C°. I find it easy enough to turn my head on those infrequent occasions when I want to view its display. The probe wire is a fairly short run and terminates in the middle of an access cover underneath the horizontal stab. It is a fairly simple retrofit, but you do have to supply power to its display.

[Doug Rohrer]

Hey guys, I am talking about a simple non-electronic thermometer. It has a dial with a 4" probe that sticks out into the airstream. My C-172 trainer and a Baron I fly in uses this device. No wires. Is there a place that it can be mounted that is easily seen by the pilot and gives a reasonable temp reading? This is a VFR airplane.

[Mel]

Doug,
For several years, I had one sticking through the side skin just below the longeron and just forward of the spar carry-through bulkhead in my -6. I made a bracket that was attached to the longeron closeout and let the probe stick through the side skin. It seemed to be pretty accurate.
I removed it when I installed my Dynon.