Hi Guys
I think you will find on all Boeing aircraft if the elevator is out of neutral
for a set amount of time the horizontal stabilizer runs to return the elevator
to
the null position.Hence retriming the aircraft.Hence the name stabilizer trim
I think also you will find that the tab on the elevator is not
a trim tab but moves in the opposite direction to the elevator movement.
So until we get a working FDM for the horizontal stabilizer in FG anything
else will be a hack.
Cheers
Innis
>
> Hi,
>
> I just tried with the SenceaII and both Ti and elevator filter influence this.
>
> Great, thanks to all for the help!
>
> Cheers
> Heiko
>
> > If you have a pid-simple-controller,
> > try increasing Ti, it slows down
> > the action.
> > > Hi Torsten,
> > >
> > > That sounds like it could be done without nasal just
> > in the autopilot file. I guess the speed of the
> > trim-pitch-channel can be changed with the filter? (The
> > 737-300 has a speed-trim at certain situations)
> > >
> > > Kind regards
> > > Heiko
> > >
> > > > Hi Heiko,
> > > >
> > > > the auto-pitch-trim channel moves the elevator
> > trim to
> > > > return the
> > > > elevator into the neutral position while the
> > pitch-channel
> > > > moves the
> > > > elevator to change attitude.
> > > > Or a bit more technical:
> > > > The auto-pitch-trim-channel compares the
> > elevator-pos-norm
> > > > to a
> > > > reference of zero and adjusts elevator-trim
> > > > The pitch-channel compares e.g. current pitch
> > with a
> > > > reference of some
> > > > calculated target pitch and adjusts elevator-pos
> > > > Usually the pitch-trim channel is much slower
> > than the
> > > > elevator channel.
> > > > HTH, Torsten
> > > >
> > > >
> > > >
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