Hi, Melchior FRANZ schrieb am 02.02.2009 18:43: > Ever since helicopter support was added to the YASim FDM > there's an annoying bug: even when parked, with rotor off > and braked, helicopters slide happily around on the ground. > > some time ago I dug into this problem and tried to fix it. My idea was, to check, if the movement is smaller than a very small number "epsilon", and if yes, set the movement to zero. The movement need to be measured against the ground, which could be the carrier. This should fix the sliding on ground. But the fix didn't work, because there is no very small movement. All gears I was looking at (only a very small number) were oscillating with a frequency of 60Hz. The amplitude was much to large to neglect. I was not able, to kill these oscillations.
The cause, why you can see this problem mainly on helicopters, are some simplifications in the rotor calculations, which cause the rotors to generate a very small force, even when not rotating. Non rotor aircrafts should show the same problem, if some wind is blowing. Maik ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
