The A340 is one of my favorite aircraft and Aerodesigns has done a terrific job creating this aircraft. I like the wing flexing but sometimes it doesn't seem quite right. For example, when I load the aircraft at Seattle KSEA the wings and the aircraft seem to "bounce" before it settles down. Even when tsxiing the wings sometimes jump up and down and smoke is visible from the landing gear. On landings the aircraft wings will flex up and down erratically. Is there any way to fix this behavior?Thanks for your help!Airbus

Hi Airbus!This is a problem with FS9 that I have noticed happens with other aircraft as well, including the Meljet's, Posky's, and IFDG models, among others.Sincerely,Dennis D. Mullert

"For example, when I load the aircraft at Seattle KSEA the wings and the aircraft seem to "bounce" before it settles down." Are you saying this doesn't happen anywhere else? I would be interested to know if that is the case, or whether it is a different result in different places. Perhaps also whether the effect changes with add on scenery. For trying to cure the smoke effect I think the best thing to look into is the main wheels settings, especially the compression settings, in the contact points section of the aircraft.cfg file. I have been experimenting in this area with the Meljet 747-400 and noticed improvements with certain settings. All adjustments should be checked by using a fairly close up outside view in spot mode and at various fuel and payload settings. This will take a long time and it might be only possible to improve it rather than eliminate the effect altogether. Also, below that are further settings, these examples from the default 737-400. static_pitch=0.04 //degrees, pitch when at rest on the ground (+=Up, -=Dn)static_cg_height=7.67 //feet, altitude of CG when at rest on the groundgear_system_type=1 //Hydraulicyou might find an improvement with changing the static_pitch (angle) setting and the static_cg_height setting. I would look at the latter first as changing it might reduce or eliminate the bounce when starting the sim. These settings are purely for the positioning of the plane relative to the ground while in slew mode and I think also when first starting the sim. If you get it wrong, the plane might suddenly rush forward at high speed when coming out of slew mode. This should also be tested at low fuel and payload settings before adopting final figures.

Charlie,When you mentioned "low fuel" I think you it on it exactly. In the flight I was describing I had reduced my fuel to only 30% in the left and right tanks and zero in the rest because of the short flight. With that low fuel perhaps the lower weight increased the wing flex and smoke effects when taxiing and landing. I raised the fuel to 50% in the left and right tanks and the erratic flexing and smoke effects disappeared. Perhaps there is a "minimal" fuel or weight threshold whereby these erratic effects are not present.I have not experimented yet with the other settings or scenery as you suggested, but I will let you know if I find anything interesting.Thanks for your reply!Airbus

The thing in common with your findings and mine is that the lower the total weight, the more the unwanted effects seem to occur. I'm still experimenting with my wheels settings and find that raising the static compression figure for the main wheels seems to help. I change by one tenth of a foot at a time. Any amount changed here must be matched by the same amount of change in the main wheels height settings, if not, the wheels will be seen to be above or below ground. Also there seems to come a point where it is necessary to change one setting a little more or less than the other, depending whether you are reducing or increasing the amounts. Reducing the compression ratio slightly also seemed to help. I still haven't eliminated the smoke entirely but it's a lot better than it was.