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WBcoeffs.ini

Posted: Sat Feb 10, 2024 1:48 pm
by Scorpi1987
Hi there , currently iam working on the implementiation of the MSFS model in Jeehell

some has the issues that the Weight&Balance calculation is wrong with my Flightmodell.

and the only that ive found what can fix it is the WBcoeffs.ini... but i dont know what the fields mean...

Can somebody explain it for me ?

[Weight&Balance]
LEMAC_FS_ft=3.43963254593
LEMAC_real_m=17.8015
MAC_m=4.1935
MAC_FS_ft=13.7582
DOWarm_FS_ft=-0.26
OAarm_FS_ft=21.397
OBarm_FS_ft=-3.225
OCarm_FS_ft=-26.651
CPT1arm_FS_ft=21.545
CPT3arm_FS_ft=-13.239
CPT4arm_FS_ft=-23.99
CPT5arm_FS_ft=-34.548
OAarm_real_m=12.328
OBarm_real_m=19.832
OCarm_real_m=26.973149
CPT1arm_real_m=12.283
CPT3arm_real_m=22.885
CPT4arm_real_m=26.162
CPT5arm_real_m=29.38
PantryE_real_m=6.6499
PantryF_real_m=33.1499
fixedTKinnerArm_FS_ft=3.31
fixedTKouterArm_FS_ft=-7.60
fixedTKcenterArm_FS_ft=4.15

Re: WBcoeffs.ini

Posted: Sat Feb 10, 2024 2:45 pm
by jeehell
Those are used by my soft to compute a CG position from the real acft data.
I then use the CG to update fake weight stations to have the correct CG in P3D.

Re: WBcoeffs.ini

Posted: Sat Feb 10, 2024 3:37 pm
by Scorpi1987
ahh that is what i need :-) is it possible to adapt it to my Model Weight and blance ?

[WEIGHT_AND_BALANCE]
max_gross_weight = 174165 ; Empty weight, (LBS)
empty_weight = 90400 ; Empty weight, (LBS)
reference_datum_position = 0, 0, 0 ; Position of reference datum relative to FS(0,0,0) (FEET), z, x, y
empty_weight_CG_position = -9, 0, -1 ; Position of airplane empty weight CG relative to reference datum (FEET), z, x, y
CG_forward_limit = 0.16 ; Gravity center forward limit (longitudinal offset) for longitudinal stability
CG_aft_limit = 0.4 ; Gravity center after limit (longitudinal offset z) w.r.t reference datum for longitudinal stability (FEET)
empty_weight_pitch_MOI = 3027957 ; Empty pitch moment of inertia, Jxx (SLUG SQ FEET)
empty_weight_roll_MOI = 840695 ; Empty roll moment of inertia, Jzz (SLUG SQ FEET)
empty_weight_yaw_MOI = 3507948 ; Empty yaw moment of inertia, Jyy (SLUG SQ FEET)
empty_weight_coupled_MOI = 1000 ; Empty transverse moment of inertia, Jyz (SLUG SQ FEET)
activate_mach_limit_based_on_cg = 0 ; Activate mach limitation depending on CG position (true if > 0 /false othewise). Mostly for Concorde).
activate_cg_limit_based_on_mach = 0 ; Activate cg limitation depending on mach value (true if > 0 /false othewise). Mostly for Concorde).
max_number_of_stations = 6 ; Number of payload stations
station_load.0 = 170, 35.59, -1.86, 5.017127, TT:MENU.PAYLOAD.PILOT, 1
station_load.1 = 170, 35.59, 1.86, 5.017127, TT:MENU.PAYLOAD.COPILOT, 2
station_load.2 = 6115, 20.845893, 0, 5.039792, TT:MENU.PAYLOAD.BUSINESS_CLASS, 0
station_load.3 = 3505, 21.825772, 0, 0.94849, TT:MENU.PAYLOAD.FORWARD_BAGGAGE, 0
station_load.4 = 4000, -21.223969, 0, 5.794459, TT:MENU.PAYLOAD.ECONOMY_CLASS, 0
station_load.5 = 6310, -35.825745, 0.000001, 1.007935, TT:MENU.PAYLOAD.REAR_BAGGAGE, 0

[FUEL]
LeftMain = -9, -13, 2, 1800, 0 ; For each tank: Tank position (z longitudinal, x lateral, y vertical) (FEET), total fuel capacity (GALLONS), unusable fuel capacity (GALLONS)
RightMain = -9, 13, 2, 1800, 0
Center1 = -11, 0, 1, 3000, 0
Center2 = 0, 0, 0, 0, 0
Center3 = 0, 0, 0, 0, 0
LeftAux = -13, -27, 3, 200, 0
LeftTip = 0, 0, 0, 0, 0
RightAux = -13, 27, 3, 200, 0
RightTip = 0, 0, 0, 0, 0
External1 = 0, 0, 0, 0, 0
External2 = 0, 0, 0, 0, 0
fuel_type = 2 ; 1 = OCTANE 100, 2 = JET_A, 3 = OCTANE 80, 4 = AUTO GAS, 5 = JET B
number_of_tank_selectors = 1 ; Max 4
electric_pump = 0
engine_driven_pump = 1
manual_transfer_pump = 0
manual_pump = 0
anemometer_pump = 0
fuel_dump_rate = 0.02
default_fuel_tank_selector.1 = 1 ; Default fuel selector used in case of autostart for engine 1, default is ALL.
default_fuel_tank_selector.2 = 1 ; Default fuel selector used in case of autostart for engine 2, default is ALL.
default_fuel_tank_selector.3 = 1 ; Default fuel selector used in case of autostart for engine 3, default is ALL.
default_fuel_tank_selector.4 = 1 ; Default fuel selector used in case of autostart for engine 4, default is ALL.

Re: WBcoeffs.ini

Posted: Sat Feb 10, 2024 4:41 pm
by Scorpi1987
[AIRPLANE_GEOMETRY]
wing_area = 1317.5026 ; Wing area S (SQUARE FEET)
wing_span = 117.46 ; Wing span b (FEET)
wing_root_chord = 21 ; Wing root chord croot (FEET)
wing_camber = 1 ; (DEGREES)
wing_thickness_ratio = 0.02 ; Local thickness is local_chord(x)*wing_thickness_ratio, x = lateral coord
wing_dihedral = 7 ; Dihedral angle Lambda (DEGREES)
wing_incidence = 2 ; Wing incidence (DEGREES)
wing_twist = -2 ; Wing twist epsilon (DEGREES)
oswald_efficiency_factor = 0.7388 ; Wing Oswald efficiency factor e (non dimensional)
wing_winglets_flag = 1 ; Has winglets true/false
wing_sweep = 28.76 ; Wing sweep (DEGREES)
wing_pos_apex_lon = 6.193863
wing_pos_apex_vert = -0.1499 ; Vertical (y) position of wing apex w.r.t reference datum (FEET)
htail_area = 363 ; Horizontal tail area (SQUARE FEET)
htail_span = 42.10 ; Horizontal tail span (FEET)
htail_pos_lon = -70.472 ; Longitudinal (z) position of horizontal tail w.r.t reference datum (FEET)
htail_pos_vert = 6.64 ; Vertical (y) position of horizontal tail w.r.t reference datum (FEET)
htail_incidence = 0.27985 ; Horizontal tail incidence (DEGREES)
htail_sweep = 32 ; Horizontal tail sweep angle (DEGREES)
htail_thickness_ratio = 0.02 ; Local thickness is local_chord(x)*htail_thickness_ratio, x = lateral coord
vtail_area = 283.0 ; Vertical tail area (SQUARE FEET)
vtail_span = 19.20 ; Vertical tail span (FEET)
vtail_sweep = 28.00 ; Vertical tail sweep angle (DEGREES)
vtail_pos_lon = -66.436 ; Longitudinal (z) position of vertical tail w.r.t reference datum (FEET)
vtail_pos_vert = 19.70 ; Vertical (y) position of vertical tail w.r.t reference datum (FEET)
vtail_thickness_ratio = 0.028 ; Local thickness is local_chord(x)*vtail_thickness_ratio, x = lateral coord
fuselage_length = 119 ; Nose to tail (FEET)
fuselage_diameter = 14.12
fuselage_center_pos = -7, 0, 5
elevator_area = 151.52 ; Elevator area (SQUARE FEET)
aileron_area = 32.0224 ; Elevator area (SQUARE FEET)
rudder_area = 68.12 ; Rudder area (SQUARE FEET)

Re: WBcoeffs.ini

Posted: Sun Feb 11, 2024 11:17 am
by jeehell
I don't have the time to play with that sorry... it should be possible, you mostly should change the values with "_FS_ft" ending.
if you compare with the aircraft.cfg from my package you should get an idea about it.

Re: WBcoeffs.ini

Posted: Mon Feb 12, 2024 11:34 am
by Scorpi1987
jeehell wrote: Sun Feb 11, 2024 11:17 am I don't have the time to play with that sorry... it should be possible, you mostly should change the values with "_FS_ft" ending.
if you compare with the aircraft.cfg from my package you should get an idea about it.
Thanks for the tip :-) Ive found out the Values, and modified it with them from MSFS modell.. but i has no effect in CG calculation in MCDU :(
Ive inserted the original Station.Load points with edited Datum References in the MSFS, thats strange but i dont give up :D