> If the autopilot is defined within JSBSim, how will it be manipulated from
> FlightGear (as far as activating/deactivating the different modules or
> adjusting the reference/target points.)  What about things like route
> following (gps) or Nav CDI/GS holds?  How does that get
> communicated to JSBSim?

Yes this is where it gets complicated.  There are modes that are obviously
relevant to mere flight dynamics, such as attitude hold, heading select,
wings level, terrain following, etc. -- and even these use *sensor* inputs
as opposed to actual FDM aircraft state data. The other modes that are tied
more firmly to instrument/navigation/ILS etc. are of no interest to JSBSim.
So, the answer might be to allow a split. Unless I am mistaken, it seems
that ought not to be impossible.

This question arises for several reasons, one of which is that I might want
to model "non-standard" craft (I'll leave it at that for the moment).  I
want to control it in a specified way without worry that the flight will be
affected in ways that I am unaware of -- that is, I'd like complete control
(and *know* that I have complete control).

Jon


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