13.8.1 OAT probe

This entry is part 21 of 67 in the series 13 - Electrical / Instruments

The Outside Air Temperature Probe is supplied by Grand Rapids. One of the possible issues is that the OAT is used to calculate the True Air Speed (TAS). The faster you go, the higher the air temperature will appear to the probe. So locating the probe in a spot that can measure the air temperature while not being affected by the speed of the air is desirable.

One of the functions of the NACA duct is that is allows the air to slow down. So I decided to use the nose NACA duct.

Finding the center of the duct.

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The material isn’t thick enough to create a recess so I had to drill through and then create a backing plate.

From the inside with the probe (covered in plastic so the adhesive doesn’t stick to it) and the back plate.

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From the outside.

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Finished. I’ll have to put some filler in to make look better though.

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