fanavion

I cannot find aerobatic missions . Have I to download and pay them ?In free flight the Stearman cannot snap and spin.Carl

Thanks for that tip !It worked even with my good old 1990´s Winzip after renamimg *.pak to .zip.Now I found the file where the aerodynamic data ist stored : Aerodynamics.spb(for the Stearman e.g. in SimObjects \airplanes\Stearman \Sim\).So could you find out how to properly view the data stored within ?All I could determine so far via opening it in Notepad is, that it seems that we have a "lookup-table"- flight model like previous FS Flight simulators finding text entries for stability coefficients like "CYBeta", "CmAlpha" etc. The rest is not readable as text. Is that in hex like in the former *.air.files ?Carl

>Here's the sitch...>>Aircraft: Douglas DC3>Wind: 274 @ 18>Airport: KTHV>Runway: 35What DC-3 ? The MS default one or an addon ?Carl

I wrote above:This "hard-wired" flight model uses the data stored (and edited at will )in the aircraft.cfg- and .air-files to simulate a specific type of aircraft.I should have added: This data used by the flight model are 1.some (!) dimensions, weight and engine parameters, mostly but not exlusively in aircraft.cfg 2.dimensionless coefficients (derivatives), exclusively in .air-files. The latter may be derived from real life tables or computed by the FS tools FSEdit resp. Air Wrench, but also by costly professional programs. As well they may be tweaked manually (AAM, AirEd ) to obtain the desired handling characteristics and performance , which naturally includes some classes of V-speeds (classes see above). I point out that these coefficients take into account aircraft type-specific geometrical data which are not found as individual dimensional values in the .air-files ! Aircraft.cfg has such dimensions but they are used only by FSEdit to calculate the coefficients of the .air-files. They are not used directly by the flight model.Yes, it is complicated, but this is the way it is :-) CheersCarl

>Does anyone know how FS9 calculates V-speeds? Does it use the>figures in the aircraft.cfg files, or is it embedded in the>AIR file ?Andrew,the speeds of the simulated aircraft at specific flight conditions are output by the flight model (in other words flight physics model or simulation engine). This "hard-wired" flight model uses the data stored (and edited at will )in the aircraft.cfg- and .air-files to simulate a specific type of aircraft.V-speeds like Vr,Vs, Vs1, Vmca, Vx , Vy can be determined by the designer or user in flight testing the simulated aircraft measuring the speeds at appropriate flight conditions . They may or may not be equal to real life values, acording to the capability of the designer and/or limitation of the flight model. But if you fly the simulated plane properly you have to use the simulated speeds.I