Hello again,
> Hello, > > Refining the 737-300 model and it's fdm based on the 737fdm > by David Culp I added more proper mass locations > based on a real mass and balance sheet for a 737-300 found > here: > http://www.aaleda.co.nz/trim-373.pdf > > With and without the new mass locations I noticed that the > Aircraft points its nose strong down when: > > - IAS > Mach 0.61 > - weight less than approx. 120000lbs even with CoG keeps on > the same location. > > I wondered if the CoG isn't right or AEROP, but even with > changing this to different values doesn't stop this > behaviour. > > CoG is located at 639in from nose > AEROP at 610in from nose. > Vr matches pretty well to the real datas > > The real 737-300 is known to have to use of Mach trim at > speed above Mach 0.61. I fixed the problem. It was an introduced bug by me from some older experiments. I had changed the tableData at aero/coefficient/CLalpha but forgot to change back. Nethertheless it would be interesting to know if Mach Tuck can be simulated by JSBSim, and how it can be handled correctly (How to apply Mach Trim to YASim and JSBSim aircrafts) Thanks Cheers Heiko __________________________________________________ Do You Yahoo!? Sie sind Spam leid? Yahoo! Mail verfügt über einen herausragenden Schutz gegen Massenmails. http://mail.yahoo.com ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
