> Does anyone know if there is something similar in JSBSim? It seems that the > spoilers there are only symmetric, so are useful for landing, but not for in > flight use? > > -- Adam
It hasn't been done, yet - I was just discussing this offline with someone. Let me say that, yes, it certainly CAN be done, without question. At one time years ago I modeled certain aerodynamic aspects of a military aircraft and great pains were taken to model similar things, and other much smaller effects. The effect cannot be modeled without some thought, though. Remember that JSBSim models aerodynamic forces and moments using aerodynamic coefficients and stability derivatives. By calculations, empirical data, flight test data, etc. one can usually determine the total (symmetric) effects of spoilers which will generally be: 1) effect on lift 2) effect on drag 3) effect on pitching moment If the spoilers are deployed asymmetrically, the effects are wider: 1) effect on lift 2) effect on drag 3) effect on pitching moment 4) roll 5) yaw 6) side force ... all six axes ... If we can determine the symmetric case, we can figure out the asymmetric case. Jon _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
