2010/11/28 Gijs de Rooy <gijsr...@hotmail.com>:
> Hi all,
>
> after updating fgdata from Gitorious this evening and installing the win32
> nightly binary from
> Hudson (28-nov-2010 7:00:55), JSBSim aircraft suddenly bounce, when at the
> ground. Some
> aircraft bounce more than others (747-400 and C172P for example crash due to
> the extreme
> forces), while the followme car only bounces up and down a little. I was
> able to drive around
> normally (apart from the bouncing) with the followme. So it looks like it
> depends on the gear
> compression/spring settings of the aircraft being operated.
>
> The YASim aircraft I tried did not show this behaviour. I suspect the
> problem arised after this
> commit by Erik:
> http://www.gitorious.org/fg/flightgear/commit/ad51a9bde2995605984161af1b4273b28ce4fddc
>
> Any clue on what's wrong? Can anyone confirm this behaviour?
>
> Cheers,
> Gijs
>

Hi Gijs,

I could not reproduce the problem you described. Tested last git revision for
SimGear (1cb8f9237cb7fa47eb8e4a89f135ac17656315a5),
FlightGear (1cf207e0540712d3344c48f936a7aade3c5c2797)
and data (115032a7c5828c7e82462ca8e57ab0be444d4120).

I tried the following commands

fgfs --fg-root=/path/to/my/copy/of/fgdata

and

fgfs --aircraft=747-400 --fg-root=/path/to/my/copy/of/fgdata

AFAICT, these are supposed to run the C172P and 747-400. I played a
bit with the Cessna (taxiing, taking-off, landing, hard landing, ...)
and it behaved correctly. Since I cannot pilot the 747-400, I taxied
it a bit and took off and everything went well (well, except that I
crashed it while trying to land it).

Since I am mostly involved in the landing gears code of JSBSim, I
would be interested in having more details about the problem you
experienced.

Cheers,

Bertrand.

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