Adverse Yaw seems to be completely missing in 2024. Planes behave as if rudder assist is on, even when it isn’t. I remember it was initially missing in 2020, but was added later. Coordinated turns is an fundamental part of flying, so this is a big gap for anyone learning to fly.
EDIT: This seems to be plane specific and not related to the general flight model.
EDIT EDIT: Nope, seems to be working fine for me now. If mods wish to delete this, thats fine.
Which plane were you flying? This is a fairly easy one to prove. I’ll get some graphs up shortly of steam 172. What I did last time was to plot the planes path, and its heading. When attempting a bank to the right, there should be a brief drift of the nose to the left, before correcting to the right.
I’m sure I’ve tested this ages ago in 2020. I’ll link that post here also when I find it, to also double check what simvars I was viewing.
Sadly, once again I find I cannot get LiveFlightData to read the turn co-ordinator simvar, as it crashes LFD.
But I can clearly see deviation in the cockpit when banking left, and right. More deviation to the right, which makes sense I believe.
I got a plot from SPAD, but that records value changes, so when level flight is established, it stops sending data. What you end up with is this. Positive figures are right turns, left turns are in the negative. You can see flight is more un-coordinated in the right turns.
That’s both surprising & upsetting – most of the times I have had LFD crash was when I gave the simvar incorrect units or set it incorrectly. When setting it correctly LFD worked as expected, although I don’t recall ever using “turn co-coordinator simvar” with LFD – but now you have me curious !!
I figured out what I was doing wrong, and got some turn co-ordinator data in LFD.
Polling rate was 20Hz. Again, left turns in the negative, right turns positive.
You can see again that the turns are more un-coordinated to the right, presumably due to a clockwise rotating propeller, or rather they are more co-ordinated in a left bank for the same reason.
What I did was change the default Unit of measurement in LFD from “Position 128 (-127 to 127)” to “Enum”.
Tried again in a different plane, this time the PC-6, with roughly the same results, though larger here.
The variation, and amount of time it takes to get back to the centre of the graph, and associated wiggle, will be down to each planes autopilot PIDs.
From what I can see I think the answer now is roughly the same as it was back then.
Is it correct to say there is no adverse yaw? No.
Is there enough adverse yaw? I have no idea, and it will vary from plane to plane so the “flight model” isn’t necessarily to blame, but how each plane is simulated.
Actually, I spends most of my time in 172s, the G1000 and basic. And that’s where I am noticing it. I checked a couple of other planes and found it isn’t universal (Cessna 400 for example seems fine) So this seems to be plane specific and not with the general flight model.
All I know is that when I turn my yoke left or right in the 172 without rudder input, the ball does not move in the classic and the slip indicator does not move in the g1000. This is of course with the auto-rudder assistance off.
I’m not seeing that in that case. It doesn’t move much but it is discernible. I’ll see if I can record some footage, and upload.
Actually, I’m not seeing it now either. Seems to have been a temporary condition? I don’t know. Thanks for looking at this. It does seem to work properly now.
Sorry for wasting your time.
No worries. It was useful to re-test what I had done back then for 2020.
Moved to User Support Hub that is more appropriate for community support.
