Re: [Flightgear-devel] Airliners and Auto Pitch-Trim

[Heiko S. <aei...@ya...>]

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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