FS2002 Application Note [/p] [/p]Organize your {Airplane Geometry} section [/p] [/p]The following is an example of a typical Airplane Geometry section that comes with a downloaded Sim model. This data was likely generated from running the Sim with an Aircraft.CFG file containing only a preamble such that it could be selected in the FS menus. The Aircraft.CFG file is then generated by FS2002 and the values are populated into each section based on the AIR and perhaps the MDL file. [/p] [/p] [/p]Sample {airplane_geometry} section:{airplane_geometry}wing_area=6470.000000wing_span=231.833333wing_root_chord=29.000000wing_dihedral=6.998291wing_incidence=0.000000wing_twist=-3.999023oswald_efficiency_factor=1.570486wing_winglets_flag=1wing_sweep=0.000000wing_pos_apex_lon=0.000000wing_pos_apex_vert=0.000000htail_area=1820.000000htail_span=73.166667htail_pos_lon=-102.500000htail_pos_vert=0.000000htail_incidence=0.000000htail_sweep=0.000000vtail_area=1350.000000vtail_span=41.892720vtail_sweep=0.000000vtail_pos_lon=-116.666667vtail_pos_vert=5.833333elevator_area=455.000000aileron_area=268.720000rudder_area=229.500000elevator_up_limit=32.501974elevator_down_limit=26.626481aileron_up_limit=19.480565aileron_down_limit=14.896903rudder_limit=23.491270elevator_trim_limit=19.480565spoiler_limit=59.988681spoilerons_available=1aileron_to_spoileron_gain=0.000000min_ailerons_for_spoilerons=0.000000min_flaps_for_spoilerons=0.000000 [/p] [/p] [/p]Reorganized {airplane_geometry} section{airplane_geometry}// data in ft. or sqft.wing_area = 6470.00wing_span = 231.83wing_root_chord = 29.00wing_pos_apex_lon = 0.00wing_pos_apex_vert = 0.00// data in deg.wing_sweep = 0.00wing_dihedral = 6.998wing_incidence = 0.00wing_twist = -3.999// wingoswald_efficiency_factor = 1.570486wing_winglets_flag = 1htail_area = 1820.0htail_span = 73.17htail_pos_lon = -102.5htail_pos_vert = 0.0htail_incidence = 0.0htail_sweep = 0.0vtail_area = 1350.00vtail_span = 41.89vtail_sweep = 0.0vtail_pos_lon = -116.67vtail_pos_vert = 5.83 [/p] [/p] [/p]SummarySome important observations clearly come out of this: * The wing efficiency cannot exceed 1.00 * The excessive wing_twist has been used to tune for pitch * The wing sweep is greater than 0.00 for jets [/p] [/p] [/p]What to doThe following is a standard procedure for configuring your model: * Define the correct empty and station load weights * Set wing efficiency in the range or 0.71 - 0.83 * Set wing incidence to 0.997 and wing twist to -1.050 * Enter the correct wing sweep angle (swept back from right angle) * Adjust cruise pitch (lift vector) fore-aft by changing apex_lon * Adjust (lift vector) magnitude by changing cruise_pitch_scalar * Run a number of test flights and tweak * Enjoy flying your Sim model [/p] [/p] [/p]Gregory Abbey - Edwinnengineering

Gregory looks like you must have cross posted -- please see my reply in the GENERAL FS2002 forum.Barry

Yes.. you are right. Sorry but it was early AM. It happens once in a while!!Gregory Abbey - Edwinnengineering