Quoting Lee Duke <[EMAIL PROTECTED]>: > > First, I don't think I'd base anything on how well a simulator models > the transonic region or Mach effects as one person mentioned. Unless the > simulation was put together by a complete moron, those effects should be > entirely in the aerodynamic model and not in the core simulation. > > Second, and I know you don't want to go look at this, but FlightGear > works with AeroSim http://www.u-dynamics.com/aerosim/ which is a > Matlab/Simulink tool kit. I think that's a big feature. You may not.
Well, I trust JSBSim a LOT more than I trust X-Plane's blade element model, as far as FDMs go. For one thing, if a pilot complains that X happens (insert your favorite pilot complaint, e.g. it doesn't stall at the right airspeed, doesn't roll fast enough, rolls too fast, steady heading sideslip not correct, etc.) how do you fix it in X-Plane? Yeah, you reshape the wing somehow, but what exactly needs to be done is unknown, or at least they didn't teach me that in Aero Engineering 101. I know how to change coefficeint tables for the desire effects, or how to fake something. If the characteristics of the aircraft in transonic or supersonic flight are known, I'll bet you I can come up with a coefficient table to match the results, since I can ignore Mach effects and shock waves, and other invisible gremins. Concerning AeroSim, yeah, I'm sure it's a wonderful tool, but I have bigger issues than just the flight model. With some work, I can write test routines and scripts to fly my flight tests to match, and tweak the tables to match. For this exercise, however, I have to worry about the entire training environment, including but not limited to: flight dynamics (which just need to be close, and in subsonic flight), control loading interface, aircraft system models, visual, airports, navaids, yada yada yada. Thanks to everyone for all the words ont he subject. Curt, they need to stop paying you by the word ;-} Bill _______________________________________________ Flightgear-users mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-users 2f585eeea02e2c79d7b1d8c4963bae2d
