eddito2010 Posted April 12, 2021 Report Share Posted April 12, 2021 Hello, Can someone explain how to calculate the value of the needed trim for takeoff? I will appreciate a lot. Thank you Quote Link to comment Share on other sites More sharing options...
N1K Posted April 13, 2021 Report Share Posted April 13, 2021 Don’t believe thats a simple question in xplane. From what I gather, the slider on the weight screen for CG shows the displacement from the models reference point in inches. Don’t think LES state what the datum they used is anywhere, nor is the charts for it in the aircraft package. If you do find them, theres likely still some math required to convert it to Saab which use the nose as the datum, or convert it to %MAC. Which may again require you finding what the station of the leading and trailing edge are. With all of that you could determine the trim setting. Alternatively, buy that app thats kicking around where all that has been done, or set neutral if not slightly nose up and hope it works Quote Link to comment Share on other sites More sharing options...
eddito2010 Posted April 13, 2021 Author Report Share Posted April 13, 2021 Thank you N1K for your response. How all others (including you) set trim for takeoff? I set it to what i suppouse it should but it is far from the correct method. Quote Link to comment Share on other sites More sharing options...
Milan Bogicevic Posted April 13, 2021 Report Share Posted April 13, 2021 What i do is when using flap 0 i put trim 1 notch up on the gague, and when i use flap 15 i leave it at 0. All that with cg position on default in load screen. Works well for me Quote Link to comment Share on other sites More sharing options...
eddito2010 Posted April 14, 2021 Author Report Share Posted April 14, 2021 Thank you....will try Quote Link to comment Share on other sites More sharing options...
jgniewkowski Posted April 15, 2021 Report Share Posted April 15, 2021 And zero is the bottom of the green area? Quote Link to comment Share on other sites More sharing options...
N1K Posted April 15, 2021 Report Share Posted April 15, 2021 middle Quote Link to comment Share on other sites More sharing options...
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