I don't need assumptions to my original question and would much prefer that somebody on the PMDG development team answer this question in regard to the replication of the aerodynamic forces. Will the NGX use aerodynamic theory to predict the force on each airfoil based on lift and drag coefficients etc. etc.? I find flying a real level D sim much harder than flying the PMDG 737 NG and I'm just curious as to how accurate the flight model will be in relation to the real NG..Jack Noulet

I'm quite surprised you think the Level-D sims are harder then FS. I think most people who have flown them would say the opposite, except for getting used to the motion, judging flare height etc the fidelty of the high end sims makes the whole thing a lot more intuitive.Sorry to point out the obvious but even the 15 million dollar sims dont fly like the real thing hense why training for upset recovery amongst other things are limited. I think it's safe to say PMDG will do the best they can with the Boeing Data they receive and keep pushing the boundries of what FS can simulate.I've always thought of there products as top quality procedural and system trainers for desktops users. If anyone wants a realistic handling 737NG they will have to pay for a type rating and find a airline.

Jack, having been involved in developmental flight test for decades, my 2 cents to help you figure this subject out:The strongest factor affecting handling qualities in our realm is the simulation of aircraft flight controls. Flight simulation controls commonly available don't nearly simulate the force, hysteresis and friction characteristics, strongly affecting flying qualities. Next, performance. Since both aircraft and power plants are simulated, as long as they balance each other in providing nearly realistic performance parameters, such as thrust available and required and fuel flow, it is really all that is needed. Even Boeing doesn't have exact drag figures and rely on engine suppliers for thrust (equals drag) relationships.

I don't need assumptions to my original question and would much prefer that somebody on the PMDG development team answer this question in regard to the replication of the aerodynamic forces. Will the NGX use aerodynamic theory to predict the force on each airfoil based on lift and drag coefficients etc. etc.? I find flying a real level D sim much harder than flying the PMDG 737 NG and I'm just curious as to how accurate the flight model will be in relation to the real NG..Jack Noulet

Thanks to all for your extremely informative comments regarding the subject matter.Regards,jack noulet