Melchior FRANZ wrote: > 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. > > Andy knows about it and explained why it happens, but claims that > there's nothing to be fixed in the FDM code. Instead, he suggested to > place masses and weights "appropriately" in the FDM config. Then the > sliding would stop. > > I've spent many hours on that, without success. And I even doubt that > is works: after all, there are adjustable pilot and passenger > weights, different loads (MG, missiles, etc.), changing fuel level. > So, how could one find a working mass distribution for all these > different states?! > > I've tried a lot of other things -- most of it were ugly hacks. > Different gear (skid) parameters, masses that would only get > activated when the helicopter is parked, thrusters that would counter > any movement, thrusters that would press the helicopter down. Nothing > worked. (Oh, and I tried to fix the gear code itself -- without > success. Not that Andy would accept a patch, I guess.) > > A few days ago I found the best remedy so far: a thruster that > *lifts* the helicopter when it's parked. This stabilizes it a lot, > though when the rotor spins, all the sliding is back. > > Has anyone ever found a solution to the gear bug? Something that's > not a hack? (I'd accept an alternative FDM as well. What about > JSBSIM? :-) > > m.
Hi Melchior... and Andy I don't know about helos, but preventing an aicraft to slip on the carrier is *a real PITA*. The way to fix this leads to unrealistic smooth gear struts, not to talk about the time consumed. Well it may not be a bug in YASim, but actually it's a real unfriendly feature. I guess I wont do better than Melchior with the gear code, so I hereby add "a friendly feature preventing aircraft to slip" to the YASim wishlist. Huge tanks in advance, Alexis ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
