Re: [Flightgear-devel] YF-23/yasim: how to climb to 163000 ft
* Lee Elliott -- Friday 04 August 2006 01:05: Just a thought - what sort of speed are we talking here? AFAIK YASim doesn't 'do' trans/supersonic - might this be a factor? We are talking about accelerating from 300 kts to 2000 kts with zero throttle. I doubt that this has anything to do with trans/supersonic. I can fly from New York to London with no throttle. (At some point you should probably actually read this thread. :-) m. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] YF-23/yasim: how to climb to 163000 ft
Melchior FRANZ wrote: * Lee Elliott -- Friday 04 August 2006 01:05: Just a thought - what sort of speed are we talking here? AFAIK YASim doesn't 'do' trans/supersonic - might this be a factor? We are talking about accelerating from 300 kts to 2000 kts with zero throttle. I doubt that this has anything to do with trans/supersonic. I can fly from New York to London with no throttle. (At some point you should probably actually read this thread. :-) I will point out that while it's possible to force the YF-23 into this extreme state, if you fly it in a more normal range, it behaves pretty normally. So personally I think the YF-23 is a pretty fun plane to fly, even if it isn't 100% perfect. Based on my understanding of YASim, this has to be some sort of bug in the core yasim code since it's getting energy from nowhere. Might be some sort of numerical/roundoff issue, perhaps some of the code in YAsim makes assumptions/simplifications that start to break down at extremely high alpha angles? I'm just throwing out wild guesses here, but there's nothing you can do in a yasim config file to create energy out of nothing. All the physics is handled deep in the yasim code. Curt. -- Curtis Olsonhttp://baron.flightgear.org/~curt HumanFIRST Program http://www.humanfirst.umn.edu/ FlightGear Project http://www.flightgear.org Unique text:2f585eeea02e2c79d7b1d8c4963bae2d - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] YF-23/yasim: how to climb to 163000 ft
* Curtis L. Olson -- Friday 04 August 2006 15:34: I will point out that while it's possible to force the YF-23 into this extreme state, if you fly it in a more normal range, it behaves pretty normally. Not for me. I actually noticed the problems during normal flight. I chased the KA6 and, because (unlike in real life) there's no indication how far it's still away, I was a tad too fast when I noticed it coming nearer and nearer. I tried to fly some narrow curves, but unlike in all other fgfs aircraft, this didn't decelerate, but *accelerate*. Of course, I'm not a pilot, and in real life there'd be a FCS with g-limiter, and my body would warn me earlier, too, but that's no excuse. Unfortunately, we don't have a single halfway modern fighter in fgfs, that is not totally broken. The F16 is pathetic and unusable since JSBSim 2.0. The hunter/seahawk work nicely, but aren't exactly modern. So personally I think the YF-23 is a pretty fun plane to fly, even if it isn't 100% perfect. Sorry, no offense to Lee -- it's still very well done 3D model wise, but I find it a bit embarrassing to show off in the NTPS. I'm not even sure if this is an old bug or if it's caused by later YASim changes. I don't remember ever having seen such unrealistic behavior, and I used to fly the YF23 a lot at times. m. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] YF-23/yasim: how to climb to 163000 ft
* Melchior FRANZ -- Friday 04 August 2006 16:26: Unfortunately, we don't have a single halfway modern fighter in fgfs, that is not totally broken. No, wait. There's the harrier, and maybe the f15 is good, too (though without model). m. :-) - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] YF-23/yasim: how to climb to 163000 ft
Melchior FRANZ wrote: Sorry, no offense to Lee -- it's still very well done 3D model wise, but I find it a bit embarrassing to show off in the NTPS. I'm not even sure if this is an old bug or if it's caused by later YASim changes. I don't remember ever having seen such unrealistic behavior, and I used to fly the YF23 a lot at times. For what it's worth, the NTPS is using their own flight dynamics model and are looking out the window sans-3d cockpit, so they are just seeing the outside world + hud. Curt. -- Curtis Olsonhttp://baron.flightgear.org/~curt HumanFIRST Program http://www.humanfirst.umn.edu/ FlightGear Project http://www.flightgear.org Unique text:2f585eeea02e2c79d7b1d8c4963bae2d - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] YF-23/yasim: how to climb to 163000 ft
* Curtis L. Olson -- Friday 04 August 2006 16:58: For what it's worth, the NTPS is using their own flight dynamics model and are looking out the window sans-3d cockpit, so they are just seeing the outside world + hud. Ahh, good. In that case it's anything but urgent. m. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] YF-23/yasim: how to climb to 163000 ft
Unfortunately, we don't have a single halfway modern fighter in fgfs, that is not totally broken. The F16 is pathetic and unusable since JSBSim 2.0. The hunter/seahawk work nicely, but aren't exactly modern. I tested several aircraft with FlightGear and JSBSim 0.9.11 with the v2.0 configuration file format (JSBSim-ML v2.0). It worked fine for me, but I didn't run it through too many hoops. If you go to the JSBSim web site, there is a Bugs button you can press and enter information on what problems you hare having. By saying the F-16 is pathetic, that tells me nothing about what problems you are having. I'd like to hear specifics. Unfortunately, for the past few months I have been unable to run OpenGL apps, and am still waiting on eVGA and nVidia to resolve the issue. All that we have to go on are user reports. Don't just complain about a problem: be part of the solution. Here's the URL, www.sf.net/tracker/?atid=119399group_id=19399func=browse By the way, there is a bug report about a possible integrator windup problem with the F-16. I'll try and come up with a test for the F-16 that I can run as a scripted, standalone test with JSBSim, and investigate (since I can't run Flightgear now). Jon - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] moving hotspots?
On Tuesday 01 August 2006 15:44, Sexauer, Steve wrote: Is it possible to have hotspots on moving objects like the stick throttle? Picking on 3d objects in not yet implemented, but could be done in principle. It is something on my todo list that is not yet done ... Greetings Mathias - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
