Hello Anders, Yes you are right, after i moved the offset position, the plane do take off without sinking into the ground. But this give rise to another issue, as long as i am on external views (eg chase, fly by views), it renders as if the CG is at the tail. When i pitch up/down, the origin seems to be the tail.
I guess the external views are controlled by FG globally, is there a variable/node i can manipulate via nasal? As i was flying, i tried to change some offset positions on Sim/View node (for chase view), nothing seems to move the origin back to the ctr of the plane. and Yes, the CG of the plane is at the center as according to YASIM solver Thank you for your guidance Cheers On Monday 27,June,2011 09:29 PM, Anders Gidenstam wrote: > On Sun, 26 Jun 2011, xsaint wrote: > >> Hello All... >> >> I am trying to better understand how YASIM calculates its contacts >> points.... >> >> 2) Eventhough CG looks like it is in correct place, in YASIM, the plane >> do sink to the ground before take off. Insufficient lift maybe.... but >> the back of the fuselage do sink into the runway. As such, as >> possibility of implementing tail strikes? >> >> Much all appreciate all valuable replies and also if you could point me >> towards any valuable YASIM documents. > Another thing to check is the alignment between the 3d model and the FDM > config - make sure that your main (3d) model XML file uses the same origin > as the FDM config uses. If the 3d model itself uses a different origin > you will have to apply offsets in the main 3d model XML file to bring it > in line with the coordinate system of the FDM config. Note that shifting > the main model origin will affect the locations of views and sounds too. > > For JSBSim FDM configs it is possible to move the FDM visual reference > point, VRP, in the FDM config to match the origin of the main 3d model XML > file instead, which will not affect the other coordinate systems used in > FG. > > Cheers, > > Anders ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
