I investigated further into the stuttering issue.
I tried the UFO like ThorstenB suggested.
Then I tried some other planes and found something interesting.
There is regular stuttering with every plane I tested.
But the interval between the stutters differs with every plane.
See my results:
C172p ~6.000 sec jsbsim
747-400 ~5.100 sec jsbsim
767-300 ~2.900 sec yasim
777-200 ~4.000 sec yasim
Bravo ~1.300 sec yasim
ufo ~41.000 sec
All planes are from the git repositiry.
What I can say is that yasim-planes seem to stutter more frequently than
jsbsim-planes.
With the ufo it's almost not noticeable unless you wait 41 seconds for the
next stutter.
@Csaba and others
If you have time, could you please compare it with your numbers?
I tested at LFML (Marseille) because I get good fps there. But any other
place with good fps should be fine.
The best thing to make the stutters more noticeable is to fly in the
cockpit, fly a continuous steep turn in one direction (so you get a circle)
and look to the ground. Use a stopwatch or use the clock on the panels of
some planes.
I wonder what may be the cause for these stutters.
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