The present Fokker 50 is modeled as a "Transonic Transport" by Aero-Matic, and since no wing area is specified in the inputs, Aero-Matic guessed a wing loading of 110 lb/sq-ft, resulting in an estimated wing area of 399 sq-ft, which is too low. It's best to have Aero-Matic model it as a "Light Twin", and the latest version of Aero-Matic calls this option "Light Twin, Prop Transport" to make it more clear. Aero-Matic will then guess a wing loading of 29 lb/sq-ft, resulting in an estimated wing area of 1517 sq-ft (which is too high). Aero-Matic really needs a separate category for Prop Transports, if for no other reason than to better guess the wing area.
The best result now can be obtained from Aero-Matic by calling it a "Light Twin, Prop Transport", and entering the actual wing area of 753.5 sq-ft. The wing loading calculation will then be bypassed, as it is only used for guessing wing area. I don't know if the Fokker 50 has a yaw damper, but the model will fly much better with one, so I recommend using one. It has a mean dutch roll now, which means I need to tweak some coefficients for damper-less airplanes. Also, the Fokker 50 model is using an experimental turbine/prop combination that is putting out too much thrust. If you let Aero-Matic create a 2500 hp turboprop for you, it will fake it with a 4175 lb-thrust turbine, which I think will give a better thrust model, even if it is a fake. -- **************************** David Culp [EMAIL PROTECTED] **************************** _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
