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  #1  
Old 07-30-2022, 04:08 PM
moespeeds moespeeds is offline
 
Join Date: Apr 2021
Location: Cherry Hill, NJ
Posts: 180
Default Who flies AOA, and what system do you use?

This thread might fit better in the Glass Cockpits section, but I wasn't sure. Feel free to move it.

Who's flying using an AOA gauge, and what system do you use?

https://www.youtube.com/watch?v=8JcjWnAJGKQ

I was pretty disappointed in the lack of AOA vendors at Oshkosh this year. I currently use the Advanced Flight Systems AOA that is displayed on my AFS 4500. After getting used to it, I'm blown away that there isn't one in every GA aircraft flying. It's an amazing instrument.

I'm switching to a G3X in the fall, but I'm put off by the fact that their AOA system doesn't account for flaps down/up as it does have an impact on your critical AOA.

I'm seriously considering the Alpha Systems setup, and a Garmin installer who happened to overhear my discussion with the Garmin rep pulled me aside and told me the Alpha setup is far superior to what Garmin offers. https://www.alphasystemsaoa.com/
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  #2  
Old 07-30-2022, 04:22 PM
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jcarne jcarne is offline
 
Join Date: Jul 2016
Location: Worland, Wyoming
Posts: 2,328
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I fly with my Dynon AOA. You may get limited answers as most of donít intentionally fly on the edge with it. If that is what you want look into Onspeed (posts here often). They are cutting edge right now.
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  #3  
Old 07-30-2022, 04:33 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 8,429
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Quote:
Originally Posted by moespeeds View Post

I'm switching to a G3X in the fall, but I'm put off by the fact that their AOA system doesn't account for flaps down/up as it does have an impact on your critical AOA.
]
I would like to understand how flaps up/down impacts critical AOA.
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  #4  
Old 07-30-2022, 04:49 PM
moespeeds moespeeds is offline
 
Join Date: Apr 2021
Location: Cherry Hill, NJ
Posts: 180
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Quote:
Originally Posted by BobTurner View Post
I would like to understand how flaps up/down impacts critical AOA.
5:50 seconds into the AOA video linked in my OP.
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  #5  
Old 07-30-2022, 04:52 PM
larosta larosta is offline
 
Join Date: Dec 2010
Location: Redlands, CA
Posts: 193
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Take a look at the FlyOnSpeed.org site. There is a lot of information regarding AoA and testing of the FlyOnSpeed system in particular and the advantages of flying with AoA. The project has identified some of the weaknesses of the FlyOnSpeed system as well as AoA systems in general. I think that your time will be well spent in taking a look at the information regardless of the system you choose.

- larosta
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  #6  
Old 07-30-2022, 05:54 PM
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Skid Skid is offline
 
Join Date: Jun 2006
Location: KBUU
Posts: 292
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I use the AOA Sport, itís a stand alone system not interfaced to my EFIS. I installed it when I built my airplane back in 2003, it works flawlessly and accounts for flaps. I donít know if itís still available.
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  #7  
Old 07-30-2022, 05:58 PM
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Ironflight Ironflight is offline
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Join Date: Jan 2005
Location: Dayton, NV
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Let’s see - the answer to your first question is an emphatic “yes!!” - we have AoA in all five of our flying aircraft, and the only thing I use the ASI for is to make sure I am slow enough to deploy flaps (and gear in case of the little jet) - AoA is the primary instrument for everything else.

We’ve got two airplanes with AFS AOA Pro glareshield displays, a Dynon Skyview airplane with display on the screen - but more importantly, audio, two Garmin airplanes with audio, an MGL airplane with on-screen AoA. Getting an “On-Speed” from Vac installed as soon as I catch up from OSH. Oh yeah - the Dynon airplane also has an Alpha Systems on the glareshield.

The bottom line, in my opinion, is that anything is better than nothing, and they al work - even if they aren’t compensated for flaps. In that case, calibrate them with flaps in landing position for the most protection in that environment. Also my opinion is that Audio is superior to visual, because you’re always looking into the turn, and away from the screen or glare shield when turning, and that is when you are more likely to stall.

If you’re getting an EFIS, get an AoA probe with it, and that’ll get you started.

Paul
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Last edited by Ironflight : 07-31-2022 at 08:41 AM.
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  #8  
Old 07-30-2022, 06:31 PM
DeltaRomeo DeltaRomeo is offline
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Join Date: Jan 2005
Location: Highland Village, TX
Posts: 4,391
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AFS Pro upper left side of panel so it can be in my FOV during the 180* descending turn to final (just like them Navy carrier pilots).

It’s my primary landing instrument. Airspeed is secondary.

Pic of my panel:
https://dougreeves.smugmug.com/RV-Pa...-Res/i-LQtTQmQ


V/r,dr
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Last edited by DeltaRomeo : 07-30-2022 at 08:02 PM.
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  #9  
Old 07-30-2022, 07:17 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
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Quote:
Originally Posted by moespeeds View Post
5:50 seconds into the AOA video linked in my OP.
Okay, I get it, thank you. The section of the wing with deployed flaps has a smaller critical (stall) angle than the no flap part of the wing. But obviously the differences are not huge, or none of the uncompensated devices would work.

Doug: Did you mean upper left? [yes! Fixed now.v/r,dr]

Last edited by DeltaRomeo : 07-30-2022 at 08:03 PM.
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  #10  
Old 07-30-2022, 07:58 PM
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Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 6,804
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Been very happy with the G3X. It's included with the system so basically free, no installation other than an AOA line, easy to calibrate, good audio output,
optional GI260 display for glareshield mounting (displays on the PFD also).
It works great so what's not to like?
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