On Friday 25 May 2007 10:36, Joacim Persson wrote: > On Fri, 25 May 2007, leee wrote: > > http://www.air-and-space.com/Antonov%20An-225%20Mriya.htm > > > > it's the rear four sets. This site also has some nice pics of the main > > gear, which show that the front three and rear four units are different, > > if anyone would like to make more detailed and accurate main gear units:) > > (I can barely make a cube in Blender -- so don't look at me ;) > > I suspect it can also kneel like the An-124. Looks like that on some of the > pictures too. But the 124 has a different setup with the main gear > steering, with the two forward axels steerable instead.
Yeah - it can kneel to lower the nose for loading/unloading but I never modelled the opening nose or kneeling:) > > And rumor has it they are working on finishing the second 225 down in Kiev > now. The one they have in operation is booked up most of the time. Yeah (again) - I saw some reports saying that the sole AN-225 is in such demand that they are going to complete a second airframe, due for completion in 2008. > > > The AN-225 also has a max taxiing weight but I couldn't find the doc > > which stated what it was:( Basically, it means that the AN-225 cannot > > make ground turns above this weight and so for mtow takeoffs it has to be > > lined up on the runway and then loaded. Unlike the AN-124, from which it > > was developed, it was never intended for short-field operation. > > That information ought to be in the 2001 civil type certificate. (which may > have been published in Ukranian only though) I found the type certificate > number for it: (in latin-faked kyrillic) CTOK200-AH-225, but not the > document itself. (well, I can't google in non-latin alphabets) > > We should add some more hard points to it. One can easily dip a wingtip or > engine in the ground now by turning too hard at too high taxi speed. Max > taxi speed is probably also specified in the type cert. And CG limits, and > other goodies... The contact points should be ok as the aircraft geometry is fundamental to YASim and is taken from the 3d model. YASim does recognise ground contact with wings etc - heh - I've hit the ground with a wing tip in a turn when at very low level and realistically spun in and crashed as a result and I've also clipped a few buildings and structures and got a yaw to the appropriate side:) Perhaps the problem is that these collisions don't cause any damage. This isn't the fault of YASim because FG only really recognises a total crash and doesn't have any provision for partial airframe damage. Personally, I wouldn't do anything to pervent the wing tips or outer engines grounding when taxiing at too high a speed because I suspect this would be realistic. It's just the lack of resultant damage that's unrealistic. Of course, there's certainly scope for further tuning of the undercarriage springing and displacements - atm it's just tuned so that the a/c sits level on the ground at various weights and doesn't collapse on landing, which was a serious factor when I was developing it. It was certainly possible to collapse the nose gear by breaking too hard on the ground at high weights, which also seemed realistic to me:) I don't think I put any brakes on the nose gear, just the mains. LeeE ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
