Uavionix AV20-S AOA Questions?

[Luv2Huvr]

I’m looking for some help on the settings pre stall and cruise angles from fellow AV-20s owners especially if you have a PA28.
Got the device installed last May 2025. Just completed the Version 1.8 software update with no issues but want to ask what others are using for their set up numbers? Work is keeping me busy flying in a number of other airplanes and not flying my own so I thought checking with others would be better than just experimenting.

 

[compjtc]

I seem to recall the 172 I fly has the min set at 1 and the max at 11. Not sure how that would compare to a PA28.

Good job on the 1.8 upgrade. The AOA with it is much improved. The original AV-20 AOA algorithm was pretty bad.

 

[Comanchero Chris]

I love the AV-20S but the AoA is not useful at all, and so I disabled the audio. I’ll look into the SW version mine has, maybe it needs upgrading. The attitude indicator works very well, Density Altitude, bus voltage, OAT and TAS are very useful. I’ve recommended it as a clock replacement.

 

[Randomskylane]

Thx for mentioning the sw update. I had no idea. I wonder if they sent an email notification or something

 

[Capt. Geoffrey Thorpe]

Got an email last November - Tech Tip Tuesday

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Keeping your AV-20 running smoothly is easy when you know the steps! In this Tech Tip Tuesday, we walk you through updating your AV-20-E or AV-20-S to the latest Software Version 1.8. This video is designed to be simple and straightforward, so even if you’re new to firmware updates, you can follow along confidently.

Set aside 15–30 minutes to complete the update process from start to finish, depending on your internet connection and setup.​

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[td]

Resources & Links:

• AV-20-E Service Bulletin (Software Upgrade 1.8): https://uavionix.com/service-bulletin/av-20-e-service-bulletin-software-upgrade-1-8-0/
• AV-20-S Service Bulletin (Software Upgrade 1.8): https://uavionix.com/service-bulletin/av-20-s-service-bulletin-software-upgrade-to-1-8-0/
• CostAero AV-20 Updating Cable: https://costaero.com/product/av-20s-updating-cable/
• Sabrent USB to RS-232 Serial Adapter (SBT-USC6K): https://sabrent.com/products/sbt-usc6k

[/td]​

[td]

What You’ll Learn in This Video:

1. How to safely connect your AV-20 to your computer.
2. Step-by-step instructions to perform the Software 1.8 update.
3. Tips to avoid common mistakes and ensure a smooth update.

[/td]​

 

[asicer]

CostAero AV-20 Updating Cable: https://costaero.com/product/av-20s-updating-cable/

$150??!!?

 

[Capt. Geoffrey Thorpe]

$150??!!?

I just made my own.

 

[asicer]

I just made my own.

I'm pretty sure I could scrounge up the parts to do so from the e-waste bins at work.

 

[Capt. Geoffrey Thorpe]

I'm pretty sure I could scrounge up the parts to do so from the e-waste bins at work.

Schematic is in the service bulletin (I assume you know) - 2 DB-9 female, 1 DB-9 male, and a USB to serial adapter.

 

[asicer]

Schematic is in the service bulletin (I assume you know) - 2 DB-9 female, 1 DB-9 male, and a USB to serial adapter.

Right. Just trying to figure out if $150 is a "go away" price or if it's a "this guy's a schmuck" price.

 

[Capt. Geoffrey Thorpe]

Right. Just trying to figure out if $150 is a "go away" price or if it's a "this guy's a schmuck" price.

They are out there...

 

[texasclouds]

They are out there...

View attachment 149196

Took me a minute! LOLOL!