AoA warning occasionally jams on after landing

[davidjohnstone]

Over the years we have occasionally had the AoA warning jam after landing. It happened today after carrying out a test flight which included stalls. The AoA stall Warner worked perfectly.
any ideas on what might solve the problem

 

[Dynon]

When you say "jam", do you mean that it stays audibly alarming? This may happen if IAS is still substantially alive, and is more common in tail-draggers since they have some built-in "AOA" on the ground (they taxi nose-up). You'd mostly see this on a windy day or if you were taxiing fast. There is an inhibit below airspeed that you can set that can help alleviate the issue.

 

[davidjohnstone]

When you say "jam", do you mean that it stays audibly alarming? This may happen if IAS is still substantially alive, and is more common in tail-draggers since they have some built-in "AOA" on the ground (they taxi nose-up). You'd mostly see this on a windy day or if you were taxiing fast. There is an inhibit below airspeed that you can set that can help alleviate the issue.

Yes , occasionally the audible warning remains on as a continuous alarm. It occurs after landing. We fly an RV9A so not a tail dragged. We have been flying with the Dynon since 2008 and it’s only recently that this has become an issue. I’m searching for some link between the occurrence to establish a link, but no luck so far.
I will check on the below airspeed setting, but at present it will sound the alarm even when stationary, so I don’t expect that will be the answer.
is there a quick way to silence it ?

 

[Dynon]

When it's going off, there's almost certainly a non-zero airspeed reading. If that's happening even when there's no wind, you should try performing the zero pressure calibration, which should alleviate both the non-zero IAS and the persistent alarm. If that alone doesn't work, you should recalibrate your AOA (similar to how IAS sensing at low speeds can drift over time, so can AOA sensing).

 

[davidjohnstone]

When you say "jam", do you mean that it stays audibly alarming? This may happen if IAS is still substantially alive, and is more common in tail-draggers since they have some built-in "AOA" on the ground (they taxi nose-up). You'd mostly see this on a windy day or if you were taxiing fast. There is an inhibit below airspeed that you can set that can help alleviate the issue.

Thank you