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Old 12-03-2013, 06:19 PM
mvidalr's Avatar
mvidalr mvidalr is offline
Join Date: Aug 2011
Location: Monterrey, Mexico
Posts: 121
Question Assistance with a Dynon Pitot/AOA probe


I have a question regarding my Dynon heated Pitot/AOA probe.
It caught my attention that the stagnation port (opening facing the wind) is not completely open (or otherwise round) all the way through the pressure hole or tube.

It raised my concern because it can somehow restrict the flow of air coming in from the outside, thus having different readings at different attitudes.

I was wondering if this is normal due to the integration of an AOA in the system, or do I have to get in touch with Dynon?

Can someone who has this same unit chime in?

The unit has always been in the box since shipping, so no damage (i.e. fall) has occurred.

Miguel Vidal
EAA #1133587
RV-8 SB Wings in Monterrey, Mexico
N511MV Registered
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Old 12-03-2013, 07:01 PM
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Brantel Brantel is offline
Join Date: Mar 2006
Location: Newport, TN
Posts: 7,513

There is little to no "flow" in the pitot or AOA system. It is pretty much just pressure and the only flow is what flows in when the air starts to compress against the sensor and the tubing walls. Very little.

I doubt you will ever notice that misalignment in reality.
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Old 12-03-2013, 09:59 PM
YellowJacket RV9 YellowJacket RV9 is offline
Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,330

Mine's the same way. Sounds like nothing to worry about.
Chris Johnson
RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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Old 12-03-2013, 10:17 PM
David Paule David Paule is offline
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,081

In the photo, it looks the end has a larger diameter for a short distance than the sense tube leading towards the instrument end of the pitot tube. If that's correct, it'll probably give you a more accurate reading at a broader range of angle of attack than a simple tube.

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