excessive aoa values in outside (F2) view

[dali]

When in F2 view, aoa values are jumping up/down like crazy (up to 120 deg)...

[Akrescue130]

Are you flying or on the ground stationary when this is happening?

 

[dali]

stationary on ground in F2 view (AoA readout)

[draconus]

1. You don't need AoA reading when on the ground.

2. AoA readings on the ground/stationary are unreliable due to how the instrument works.

3. Many aircraft in DCS have false AoA readings on the ground.

Edited October 6, 2023 by draconus

[razo+r]

120 might not be excessive if there is wind present. It could blow the AoA vane (or generally mess with the probe) around, giving you 180 degrees or other random values. 

Edited October 6, 2023 by razo+r

[Hiob]

53 minutes ago, draconus said:

3. Many aircraft in DCS have false AoA readings on the ground.

Real ones too, I would assume.

[Jel]

Jup that´s quite common.

We´ll try a simple explanation:

Alpha is being measured by a small moving sensor, similar to a small wing. Imagine it like a flag in the wind.

This sensor moves freely and usually follows the opposing airstream showing relation to the aircrafts pitch angle. While on the gound, there is no airstream other than maybe wind (ah and gravity - that old b*tch), resulting in crazy values 

Edited October 9, 2023 by Jel

[jaylw314]

Wonky AOA while on the ground stationary is seen in a number of other modules.  I'm not sure if breezy conditions on the ground are strong enough to blow around AOA vanes, but that could be what they're trying to model, or it could just be a wonky DCS thing.

I've no experience with AOA vanes, but I can't say I've seen them flapping about in light breezes when I see aircraft on the tarmac, and while they might get a cover, I haven't seen gust locks or anything, so I'm guessing it's more of a DCS thing.

[Galinette]

Yes, that's because AoA sensors are more as ideal , feather like. They move with every minimal breeze or turbulence while on the ground.

IRL sensors have some mass and a little bit of friction, so they will be stuck on the ground if winds are light. They can show a similar behavior under very strong turbulent wind. In many cases the aircraft will ignore value below a threshold CAS.

So yes, it's not 100% correct, but not 100% a glitch either. Should be improved, but not a big priority at the moment.

Edited October 7, 2023 by Kercheiz