Van's Air Force
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RV9 OAT
- Thread starter MJS
- Start date
RV8JD
Well Known Member
Here is what Davtron says on OAT location:
Here is what the Dynon SkyView manual says on OAT location:
FWIW, my RV-8 (IO-360-M1B) has a Dynon OAT probe on the aft fuselage under the right stab. A friend retrofitted a Davtron OAT probe (for an AV 30) for his RV-8 on the second outboard inspection panel of the left wing. We have compared OAT readings on several occasions when flying close together and they differ by 1°F at the most. I have heard anecdotally that the 'aft fuselage under the right stab' location does not work as well for RV's with larger engines (like those for the RV-10).
My RV-8:
My friend's RV-8:
"NOTES: THE TEMPERATURE SENSOR MOUNTING SHOULD BE IN A PLACE THAT IS FREE OF EXHAUST GASES OR COWL FLAPS AIRFLOW. THE IDEAL PLACE IS TWO FEET OUT FROM THE WING ROOT ON THE BOTTOM OF THE WING. SENSOR LEADS MAY BE LENGTHENED OR SHORTENED WITHOUT AFFECTING
CALIBRATION."
CALIBRATION."
Here is what the Dynon SkyView manual says on OAT location:
"Sensor Location
The SV-OAT-340 is an outside air temperature sensor. In order for it work properly, it must be able to measure air temperature accurately. Avoid exposing the sensor to sources of heat that would interfere with outside air temperature readings such as:
The SV-OAT-340 is an outside air temperature sensor. In order for it work properly, it must be able to measure air temperature accurately. Avoid exposing the sensor to sources of heat that would interfere with outside air temperature readings such as:
- Direct sunlight
- Engine heat and exhaust
- Aircraft interior (back side of sensor)
- Heated air from the cabin exiting from an open window or cabin air exhaust port
- The installation area should have space for a nut and wires on the back side of the sensor. It is acceptable to extend or reduce the wire length if necessary. Reduce the wire length by cutting out the desired length from the middle of the wires and splicing together the remaining ends.
- If there is a backup ADAHRS in the SkyView system, it is acceptable to install a backup OAT sensor a few inches away from the primary sensor. Consider running primary and backup OAT sensor wiring together. Tape sensor wire pairs together to avoid confusion later."
FWIW, my RV-8 (IO-360-M1B) has a Dynon OAT probe on the aft fuselage under the right stab. A friend retrofitted a Davtron OAT probe (for an AV 30) for his RV-8 on the second outboard inspection panel of the left wing. We have compared OAT readings on several occasions when flying close together and they differ by 1°F at the most. I have heard anecdotally that the 'aft fuselage under the right stab' location does not work as well for RV's with larger engines (like those for the RV-10).
My RV-8:
My friend's RV-8:
MacCool
Well Known Member
Anywhere in the line of the exhaust would seem to be a bad place for a temp sensor. I put my Dynon OAT on the outboard-most inspection panel on the underside of the left wing. The wiring was twisted and ran in the same conduit as the AoA and pitot tubing. Works fine in that location
Dugaru
Well Known Member
NACA duct
Mine was originally in the pilot-side NACA duct and proved to be very inaccurate there. Reads perfectly now that it's out in the wing. Unfortunately now my true airspeed has gotten slower.
Mine was originally in the pilot-side NACA duct and proved to be very inaccurate there. Reads perfectly now that it's out in the wing. Unfortunately now my true airspeed has gotten slower.
Sportquattro
Well Known Member
I put mine in the inboard inspection panel on the Starboard wing. Works well and easy to access if needed.
eric.the.blonde
Active Member
I opted to put the sensors under the h-stab rather than the wing. The discerning factor was the location of the ADAHRS units which are mounted near the bulkhead behind the baggage bulkhead.
