AOA Block on HDX empty?!?!

[bdog]

I can not find any info on what the AOA block is supposed to be. Empty until an AOA flight test? Or all the chevrons, but not calibrated?
I do NOT have a heated probe, HDX, one screen, ADAHRS working fine on 3 test flights

Thanks

 

[PaulSS]

It will fill up with colours once you've done the AOA calibration. I assume you have an appropriate pitot/AOA probe, heated or not.

 

[bdog]

You are correct, my entire system is Dynon. I watched one video that showed a person real time conducting the stall tests. That particular series of stalls had the AOA rectangle already filled with the chevrons before the test even started. The Install manual sort of leaves that important point out. The manual seems to be more interested in applying heat.

 

[swatson999]

What do you see now? According to the manual

The Angle Of Attack (AOA) Indicator will display only when a Dynon AOA/Pitot probe has been properly installed and calibrated.

 

[PaulSS]

I think the big question is, have you done an in-flight calibration yet?

 

[bdog]

Thank you swatson !! That sentence certainly helps answer the question. Problem is...Where did you find it? And why could I not find that sentence? I just reread the section on AOA cal. and that sentence is not there. (5-22,install) I just reread Fig. 57, and still no info. So here I sit wondering where in the **** is this hidden. I am starting to notice a pattern.
PaulSS: I have not yet performed the calibration flight test. I try to read up before traveling to the hangar. No wifi there.

 

[Raymo]

@bdog I found it in the Dynon Pilot Guide.

 

[bdog]

Thank you Raymo for the info. But.....here is the problem: The 500 page installation guide covers the calibration of the indicator with no mention of the blank box, (5-22 ). The Dynon AOA Pitot Plumbing Guide only discusses plumbing. No mention of the main screen. The Pilot's User guide (4-22) finally mentions the sentence supplied by Raymo, and it TELLS you to go back to the Install Manual!!!! By the way the mention/explanation of the AOA indicator on page 4-22 is NOT listed in the Index of the User Guide. Are you starting to see the frustration involved? I want to learn, but do not hide the information from me. (Dynon, I know you're watching, please include the first sentence in Raymo's response in the install manual)

 

[swatson999]

Well, it's not hidden...you just have to do your homework. Presumably, you start with the installation manual, since you have to install the component before you can use it, and that tells you (along with the accessory manual for the pitot/AOA itself) how to do that, and how to calibrate it. The User's Guide then tells you what the pilot can expect to see and how to interpret/use it.

You, as the pilot, owner and perhaps builder of an experimental aircraft, are responsible for BOTH things...installing/calibrating/maintaining the systems, and how to use them in flight safely. That means you'll have to read both manuals, not just skim them or flip pages.

BTW, how did you expect an angle of attack indicator to function properly *without* any sort of calibration being done?

 

[bdog]

Swatson, where did I imply that the AOA would calibrate itself? Having READ the above emails I am in a quandry. I will give you the "hidden" and replace it with "out of order". Does that help? I've only done 8 panels over the years, so I am still learning. By the way the AOA/Pitot manual does not address anything electrical. Plumbing only. The ADAHARS unit is the device that translates pneumatics into electrical impulses. The Install manual (p. x) tells everyone AOA CALIBRATION is on page 5-20. Simple enough. The User manual never mentions AOA in the index. So that would be 866 pages to glean for that little iota of info. Hmmm.

 

[swatson999]

I didn't *say* that you implied it would calibrate itself. I asked why you thought that an UNcalibrated device (AOA) would work at all?

That's not an index in the User's Manual...it's a Table of Contents. There is no index. TOCs don't generally go to 2nd or 3rd or lower section headings.

Just FYI, you can search those documents. Ctrl-F.

 

[swatson999]

By the way the AOA/Pitot manual does not address anything electrical. Plumbing only. The ADAHARS unit is the device that translates pneumatics into electrical impulses.

Well, yeah, it does, but since pitot, static and AOA aren't electrical signals, the only thing electrical the AOA/Pitot Probe Installation Guide discusses is the heater element.

 

[jnmeade]

I usually do a search for the term, and it shows quickly the table of contents entries and then, of course, more, but the TOC results can get me quickly to the right section.

 

[swatson999]

And lastly:

 

[bdog]

Swatman: read question #1, fourth sentence. There has never been a question of calibration (get over it!). The question was whether or not the chevrons would or should display. As an after note, Advanced Flight used to sell an AOA that was pre-calibrated for Van's aircraft.
This is not worth the time and effort.

 

[swatson999]

Well, if you don't understand the manuals, and you don't believe people here, then there seems to be only one way to find out.

Go fly it and calibrate it.

 

[airguy]

RTFM (or lack thereof) strikes again.