I've had this happen several times, gets quite irritating at the end of a long VA flight. I will be taxiing along and then the plane starts bouncing, smoking, and skipping along, ending in a (sometimes spectacular) crash. I'm being good and taxiing at a reasonable speed (<20kts), It seems to happen around taxiway intersections, though sometimes on straight stretches. I've also created scenarios and when I start, the plane is sitting there, parking brake on and engines off, dancing happily on the ramp, wings flexing and smoke flying. Most peculiar...I have no "add-on's" to speak of, improved taxiway textures is about it. My settings are generally low to medium, as my humble Athlon 900 can hardly handle more.Any guesses? Thanks in advance...DaveKCOS

"I've also created scenarios and when I start, the plane is sitting there, parking brake on and engines off, dancing happily on the ramp, wings flexing and smoke flying. Most peculiar...":-xxrotflmao :-xxrotflmao :-xxrotflmao :-xxrotflmao :-xxrotflmaoCan you please post where it happens exactly and with what aircraft? LOL, man I still can't stop laughing...

Those "scenery holes" are everywhere. Default airports, 3rd party airports. Flatten switches have absolutely no effect on them. As a matter of fact, at least half of all default airports I've encountered have these "holes". I've had to turn off crashes in the realism settings. Breaking a nose gear on your takeoff roll isn't my idea of fun.I posted a similar thread a while back, particularly concerning the excellent freeware KBOS scenery which also has them. Just wait until DarkMoment sees this thread... hes convinced they're actually moles that keep popping out of our runways and getting squashed :).Anyway, they affect all aircraft. I haven't been able to find any cause for them, they just exist in random places all over the planet. That "dancing" thing aircraft do always occurs when you switch to an exterior view of the plane (tower or spot view). It is quite fun to watch sometimes.With all these bouncing planes, makes you wonder what MS was thinking when they designed this one. I can't beleive nobody would have noticed all this stuff during beta testing. It happens to me on just about every flight.Joe Wagner

I remember pulling off 17L at DFW in a Meljet 777 (this is one that likes to dance...), as I took a high speed turnoff (slowly) she just started "getting jiggy", hopping and bouncing then the crash and smoke. (I "extrapolated" a gate time for this one for my VA, flew in from EGLL..., wasn't going to lose that easily!!)Also flew an "alleged" 737-700 (-300 actually), Mexicana, last night from DFW. Hadn't taxied more than a quarter mile and it rolled on its side into a "hole"...more smoke...Sigh... time to turn off the crashes...it's rather odd to see happen tho!DaveMaybe I gotta turn off the crashes too...

Hm, to be quite honest, I never saw it happening!!I fly PMDG and PSS aircraft, and flew Meljet while I was still in FS2002 (with PSS panel).Only thing I noticed is very light bouncing (and I'm talking now about really small moves, what looks to me like realistic "moving" when rolling).May be dependable on the aircraft you fly.

I don't get it. I've never had holes in runways, dancing planes (and I always check plane from outside view before taking off). The only landing gear failures I've had were from touching down with too much speed on bumpy (like dirt) runways. And I can't figure out for the life of me how something like this could by system related. Of all the problems with FS9 this has got to be the weirdest. Hope a fix turns up, it must be driving you guys nuts.David

I have been getting this alot with the POSKY 757's at KMIA. I hate when I taxi all the way across KMIA or KORD to the runway and then I crash! I have had this problem on my old low end Compaq and now I have the same problem on my Dell XPS. I'm gonna see if I can send something to MS to let them know about this problem...(Im sure they already know). Does MS have a site to post problems with FS9? Or do you just post in the forums and hope one of the FS team members reads it?

Can you provide a set of steps that reproduce this with default scenery and aircraft? So far I've only heard of this happening with add-ons, thus I doubt it's anything MSFT "designed".

They have an e-mail address just for that purpose. It was mentioned here in the last day or [email protected]

I suggest you write directly an support email to the microsoft over their website. If you look a bit, I'm sure you'll find FS support, not so hard to find :)Then you have a form, and all blah blahs to fill out, and describe the problem.They wrote me back the next day with my problem. We wrote back and forth few emails, but it was unsolvable (the cross that is being seen from very high altitudes over the sea - apparently FS limitation).But maybe they can help you with this. They surely seem like they want to help.

Mostly, these problems tend to get traced back to errors in the flight modelling or, dare one say it, `operator error`. Taxiing should be done at 12 knots or less. If the plane starts bouncing as you make then turn then two obvious causes need checking before you trouble MS for a `fix`:1: Go slower2: Check that your aircraft is not over MTOW.ALL of the times I've actually seen this problem it can be attributed to the damping effects in the aircraft.cfg, not allowing the aircraft to `mount` successfully to the mesh before beginning to move when close to MAUW, meaning that the aircraft drops onto its suspension, then sets off the bouncing (if in doubt, use the slew function and F2). Both can easily be fixed. Easier still is to stop, before making turns or to turn at 10 knots or less when flying a heavy `heavy`. Allcott

Just to add my 2 cents worth ........I run a 1.2 Mhg. box with an ATI 9000 card. Not the slowest but far from the fastest. I've had the "jumpies" for like ever with NO scenery add-on's ( I have not excluded AFCAD files yet ) but using add-on aircraft ( SG,FFX DC9-10, 737-200 & 300 and Project Fokker F100 ). It can happen on start-up when I load the default flight and the A/C is parked at the gate. If I switch to an outside view I can see the A/C bouncing up and down attempting ( I think ) to get its wheels settled at the tarmac level. If this happens while you are taxiing and it starts bouncing I believe the sim senses enough stress on the gear to cause the smoking and the occasional crash. Somtimes I get these really neat skid marks during the bounce ( less than 15 kts. taxi speed ).I tested ( very UN-scientifically ) a bunch of variations on this and I really don't believe it's connected to taxi speed or weight. But I'm sorta suspicious that the problem is somehow related to the force feedback ( whether you have it or not ) and "bumps" in the taxiway and on runways that trigger the force feedback event code in the sim. I also believe the bouncing while parked and switching views is the sim re-leveling the wheels to the tarmac if the gear hight is not near exact to the model configuration ( going way out on a limb there ).If I remember right it did not happen with the default 737 , I got rid of them soon after original install but I will reload them soon and check them out. But I did take a clue from the behavior of the defaults and started messing with the add-on aircraft.cfg files. Firstly I noticed that the problem A/C wheels seemed ( in general ) to be below the tarmac level while parked so I adjusted the contact points to lift the A/C to a more correct level. I still can't determine the optimal hight but the additional hight did result in less bouncing/jumping while parked and taxiing.Then I started messing around with gear compression and the like and again noticed a slight ( subjective judgement I'm sure ) improvement in the problem. After that I commented out the whole force feedback section itself as it seemed to be useless without a force feedback control. I could be wrong here but I have seen no adverse effects to date ( not sure if there was an improvement either ).All this said I have about a 50% inprovement in the bouncing problem and about a 95% reduction in flight ending crashes. I'm pretty much convinced that this whole problem is somehow related to ground handling dynamics and effects with add-on A/C and "inherited" FS2002 A/C cfg details not really agreeing with FS2004 code.Just some more fuel for the fire. I have a number of Project AI aircraft installed and some exhibit the exact same bouncing and smoking on taxiing, landing and takeoff though none actually crash and I'm not controlling any of those guys. I'm also starting to think that theres a system specific component to this or I would think there would be one heck of a lot more discussion about the problem.I now have a new purpose in life, figuring this the *&%^$# out !!!!JimBob,"Master of the Senior Moment"

I get this in any meljet 744 sitting still on runway 34 at KSEA. 10 feet into a takeoff roll and the nose gear collapses.I dont fly that plane there any more.Eric

While almost all aircraft exhibit this bouncing behavior when switching to exterior views, there is also bouncing caused by scenery "holes" at specific locations in airports. In that, I mean that I can taxi down the same stretch of taxiway or runway and hit these "holes" at the same place each and every time. Speed is irrelevant - the aircraft bounces whether rolling at 2 kts or 140 kts.For those that haven't experienced any of this yet, take a plane, any plane. I've hit these holes with every aircraft, default or otherwise. Go to KPNE (Northeast Philadelphia) and start off on runway 24. Begin your roll down the runway, any speed is fine. Taxi or start an actual takeoff, it should work either way. By the time you get halfway down the runway you should hit some bounces. I beleive there is a second set of them if you continue further down as well.You could also try KPHL (Pilly Int'l) on either runway 27L or 27R. Roll down the runway for a ways and you should hit some bumps halfway down. I beleive the 27R bumps are a bit more than halfway down. In this case, I have experienced the holes with the default airport, and also after installing SimFlyers KPHL. After Simflyers, the holes were still there in the same place as before. Also, Simflyers does install a flatten switch to the scenery.cfg.If anyone lese tries the locatiosn and doesn't hit anything, then something else is at play here that doesn't affect everyone.Joe Wagner

Joe,Funny you should mention KPHL, thats my home AP and where I do most of my experimentation. I identified several areas in taxiways that cause a bounce ( did not record exact locations though ). It seems logical to me that those areas ( holes ? ) might be there specifically to trigger force feedback events, especially if it always occurs in the same spots ( again I'm reaching ).Would be interested though, as you mentioned, in hearing from others on this matter, glitch, bug, feature or whatever it is, cause for me and my system it just ain't right and makes me crazy !!!!I'll try to take some time here shortly and try to identify some specific areas on taxiways that others can try to duplicate the "BOUNCIES" .....JimBob"Master of the Senior Moment"