On Friday 04 August 2006 15:26, Melchior FRANZ wrote: > * 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.
Hi Melchior, been out or watching Tintin movies all weekend but I have been following this thread. I haven't flown the YF-23 for a long time but I spent ages on it when I first did it and don't recall ever seeing this behaviour. This isn't to say that it doesn't happen of course - I seem to be the only person who has problems with the weather/altitude settings behaving randomly. Anyway, I just checked the output from the stand-alone solver and there doesn't seem to be anything suspicious in it: Solution results: Iterations: 530 Drag Coefficient: 14.044194 Lift Ratio: 160.218765 Cruise AoA: 0.343368 Tail Incidence: -0.639466 Approach Elevator: -0.593619 CG: -1.609, 0.000, 0.369 Drag's a bit low and the lift is a bit high but you've got to remember that it is a low drag design and the wing is huge - it's defined up to the center-line. I can't see anything there that gives any clues about accelerating without putting energy in. Can you reproduce it while under control of the A/P? That should help me reproduce it here. LeeE ------------------------------------------------------------------------- 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.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel