On Thursday 22 November 2007 13:52, John Denker wrote:
Sorry - couldn't resist this But...
> If you think you've got problems when the heading angle goes to 180
> degrees, think about what happens when the pitch angle goes to ±90
> degrees.
Been there - done that. But seriously, I have done
> Maybe it would help to talk to the CDM guys instead of the
> FDM guys.
> http://www.google.com/search?q=car-dynamics-model
> http://www.google.com/search?q=car-dynamics-model+nascar
>
> I reckon the car-dynamics guys have a pretty good model of
> static friction and quasi-static rolling fric
On 11/22/2007 12:59 PM, Jon S. Berndt wrote:
> What happens if
> the combined moment on the vehicle and the translational force causes only
> one gear to go past its ability to hold traction on the ground?
Well, that's pretty far down on the priority list, but since
you asked:
That happens
> On 11/22/2007 09:10 AM, Jon S. Berndt wrote:
>
> > At this time, JSBSim zeroes out the wind velocities while at rest on
> > the ground, to prevent slippage.
>
John Denker replied:
> Aha. Thanks for the info.
>
> FWIW that sounds like *two* bugs to me.
> 1) Maybe we need a better model of s
On 11/22/2007 09:10 AM, Jon S. Berndt wrote:
> At this time, JSBSim zeroes out the wind velocities while at rest on
> the ground, to prevent slippage.
Aha. Thanks for the info.
FWIW that sounds like *two* bugs to me.
1) Maybe we need a better model of static friction and quasi-static
rolling
John Denker a écrit :
> On 11/22/2007 07:28 AM, LeeE wrote:
>
> > FWIW I also spotted that the coded hard-coded hud has problems
> > around headings of 180 deg so that if you are heading slightly to
> > one side of 180 deg and there's enough of a cross-wind to swing the
> > direction indicator to
> If that variable doesn't show a large slip angle when parked
> in a crosswind, that's a nasty bug.
>
> You can easily enough check whether the FDM is calculating
> this correctly by recomputing it yourself. It's just the
> angle between the relative wind vector (projected onto the
> XY plane) a
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