AFS / AOA Probe with Skyview

f5ftiger

New Member
Joined
Nov 20, 2008
Messages
8
Location
Hamburg Germany
Hello,

I have a Glasair Super IIS RG with an AFS AOA Probe installed in the wing. Top and bottom hole in the wing. Can I use that probe with the Skyview system? If yes how to connect?

Thanks for any help
 

Dynon

Dynon Staff
Staff member
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Jan 14, 2013
Messages
14,232
Location
Woodinville, WA
We know that the AOA/pitot, when connected to the AFS standalone displays, work, but you may be the first to be trying the reverse (the AFS ports connected to SkyView). Your pitot connection on the ADAHRS should of course still connect to your pitot tube, as you need that for airspeed to work well. For the AOA port on the ADAHRS, you obviously have two wing ports available to connect to, but only the one ADAHRS AOA input (our AOA/Pitot system uses differential pressure between the pitot and AOA lines instead of two separate wing-mounted ports). So which one to choose? The hole on the bottom of the wing is most likely to get a variable pressure that increases as AOA increases, which is what our own AOA pitot probe experiences on its AOA port.

So to summarize: It may work - no promises. Pitot tube goes to pitot port on ADAHRS. Bottom wing port goes to AOA port on ADAHRS. Then calibrate and see if it works.

If that totally doesn't work, try connecting using the upper wing port, and then recalibrate. That's less likely to work given that it sees a pressure gradient that's the reverse of what we're looking for.
 

airguy

Well-Known Member
Joined
Nov 10, 2008
Messages
1,121
Location
Gods Country - west Texas
With the calibration routine though, would that automatically induce the polarity change for the pressure gradient as you calibrate the system? Or is it locked in to a positive pressure gradient only?
 

swatson999

Well-Known Member
Joined
Oct 6, 2010
Messages
1,650
With the calibration routine though, would that automatically induce the polarity change for the pressure gradient as you calibrate the system? Or is it locked in to a positive pressure gradient only?

As a friend of mine used to say..."only one way to find out!" Try it :)

What's the worst that could happen? Neither line will work properly, and you'll have to install something else.

If either one does work, you're in business.
 
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