On 7/13/2021 at 1:26 AM, byork said:

The FMC will frighten out and run away at speed???
 

After some more testing, I think it's due to the AIGround utility which imply taxing distance for AI aircraft....

As both tool are great to use, it's kinda hard to decide which one to drop for me then...

Which AI Ground utility is that?

12 hours ago, byork said:

Which AI Ground utility is that?

 

This one

So when you don't use that addon, the follow me car works fine?

 

OK, I just did some more flight and test, it seems NOT related to AIGround.

For my normal flight, I have turned AIGround's Player-AI separation function off, so it should not have effect, but still, after I landing at LEMD, I requests FMC and follow it, as it's a long taxi, I deliberately test it by taxi fast to like 28~30kts, and it goes wild when I speed up, gas up to like 100kts, drift off taxi line, lost it's way, and my sim just freezed.

I have doubt that the freeze was due to FMC try to recalculate the route... but I can't be sure... after P3D freeze for like 10min, I kill it, this pic is last position logged on LNM, the FMC is completely out of the normal route.

 

Then I restart sim, loaded in LEMD again, completely closed AIGround and AIFlow, starting my test, this time I start from Gate 221 and ask FMC to take me to Gate 582. also I set a wind from 360 at 16kts.

Just as I speed up north to 22kt GS/34kt IAS, the FMC starting to drag race again:

 

After a while. FMC seems calm down and settled back on taxiway, I slowly catch up and follow it again, and then, try to up some speed again. and it goes craze again....

and I got a shoot on LNM showing the FMC goes to 82kts, and turning way back, actually I have seen it's up to like 106kts on LNM view.

 

After this, FMC completely lost it's way and stopped there, at least my sim didn't crash this time....

 

The only other AI traffic related tool I have on  this scene is UTL.

 

 

BTW, even at low speed, the FMC would still get some problem at sharp corner , as these:

Since I didn't record video,What I have see is like this:

Seems in 2.3b, it's a little better than OP's one, as it will damp back to normal rather than diverge out... but still... I was turning at 90degrees at 10kts, just at my company's limit in realword.

 

I have both flight's Ultimate Ground Crew X.LOG saved, but I myself didn't find anything interesting in it. If you need them, I'll send you via ticket or email.

 

Thank you for the detailed report.

It appears if you start taxiing a high speed, it can trip up the follow me car.

We'll investigate.

Cheers,