Frequently Asked Question

If the OAT probe is accurate when the airplane is in the hangar before a flight, but reads high when in flight or outside the hangar, the OAT probe is being heated by the sun, or by the engine. The OAT will need to be re-located. In our experience with RV-6, 7, and 10's, the probe may be mounted under under in the wing-to-fuselage intersection sheet metal, and this is far enough off the center line of the airplane that the engine's heat does not affect the readings.

If the OAT reading is always too high, the OAT probe may not be a GRT OAT probe. A GRT probe will measure 10k ohms resistance at 77 deg F.