On Thursday 28 August 2003 14:16, Manuel Bessler wrote: > On Thu, Aug 28, 2003 at 03:03:40AM +0100, Lee Elliott wrote: > > I'm not very familiar with JSBSim so I don't know if it includes a gear > > compression factor. This could be important when you set the gear up because > > it might assume, or you might have to tell it, whether the gear z-axis is a > > loaded or unloaded figure. > > > > When I started animating u/c suspension I found that it's easier if you model > > the gear at it's unloaded extension i.e. it's position when the a/c is in the > > air and there's no weight on it. If you're not going to animate the > > suspension then you should model the gear in it's loaded position other wise > > it'll stick through the ground while it's landed. > > I'm not gonna animate suspension at the moment. i guess the dxfs i used > are set up for the a/c sitting static on-ground. > > I was wondering about how jsbsim determines where to put the 3d model. > All i can see in the config is the geometric refences of the different > a/c parts like engines, gear, c.g., pilot eye pos'n,... but nothing > referencing that coord-system with ground, except thru the gear pos'ns > > Two ways i can imagine jsbsim doing this: > (imagine the gear, all with different lenghts) > 1. it takes the AC_GEAR from <UNDERCARRIAGE> that would hit the ground > first if the aircraft would be dropped down on the runway vertically. > > 2. it does 1. but for all three, but rotating/translating the 3d model > so that all 3 gear of the 3d model will be on the ground like the real > world (given that the 3d model and the fdm gear definitions correspond) > > > Regards, > Manuel
Try it and see what happens:) I'm not trying to be flippant but that's often the quickest way of finding out and you're not going to break anything - either it'll work or it won't. If it works then you may have to fine tune it but that's normal, in my experience. LeeE _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
