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    Library How to

Bouncing on landing

Cees Donker

SOH-CM-2024
I got a plane that bounces too much on landing, even when I put her down ever so gently. Can this be cured /adapted in the cfg file or is it in the air file?

Cees
 
FSX! What else? I am in the correct forum?

:biggrin-new::biggrin-new::biggrin-new:

Cees
OK - you likely can edit the aircraft.cfg file in the contact points section, probably the damping ratio of the main gear. It controls the "springy-ness" of the landing gear at touchdown. For your taildragger it normally should be lines 2 and 3 (MLG, line 1 is the tail wheel), but the order can be different, though I have never seen it.
See this page for some insight.

https://forum.flyawaysimulation.com/forum/topic/5779/contact-points-explained-and-some-fixes/

Further searches and experimenting will likely solve the problem (be patient). Also, set up a saved flight starting with a short final on speed and altitude. Reload and test will go much quicker.

Not always a problem with taildraggers depending on the model but landing fast, or three point rather than on the backside of the mains can be a problem. DC-3s are a typical example.

The aircraf.cfg section of the FSX/ FS2004/P3D SDK's have a great breakdown of the various parameters and what they do.
 
Cees,

If you use ACM (Aircraft Container Manager) you can have a visual guide to the aircraft. It's available over at Simviation.

Since the model is FS9 originally, you can do the changes in ACM and then just copy/paste them over to the cfg for the FSX conversion using Notepad or something similar on the cfg file itself. The format is the same between the two.

Some points to keep in mind with ACM:

1. Zooming in/out is done by holding down the middle mouse button and sliding the mouse left/right. Can't use the roller. Takes getting used to, but not bad after a while.
2. The best way to reset the contact points and scrapes (that I've found, anyway) is to reset the CG altitude and the Angle to "0" and work on the wheels from there.
3. The static compression can be anything, but I've found that static compression at 0.25 and the ratio at 2.5 works well.
4. For the oleo (shocks) I tend to use between 0.65 and 0.75, but any number less than 0.85 and greater than 0.5 seems to work well depending on how much "bounce" you want to have in the end.
5. When lining up the wheels for the angle and cg height, remember to use the "light blue" points and NOT the main, "yellow" points. When you load up the aircraft and begin to mess with the points you'll see what I mean. The "blue line" is the cg height and should bisect the "blue points" that represent the aircraft sitting on the ground/ramp.

The reason I mentioned this method is because all the points and cg and angles for the aircraft sitting on the ground have an interaction with each other. If you change one or two it may have an affect on the others, though sometimes you can get lucky.

It's worked on the updates I've done so far. It shouldn't have any adverse effects on handling if using the default air file that comes with the aircraft since it's just changing the contact points.

Good luck!

Jorge
Miami, FL
 
Cees,

Try this:

[contact_points]

//0 Class 0 = None
// 1 = Wheel
// 2 = Scrape
// 3 = Skid
// 4 = Float
// 5 = Water Rudder
//1 Longitudinal Position (feet)
//2 Lateral Position (feet)
//3 Vertical Position (feet)
//4 Impact Damage Threshold (Feet Per Minute)
//5 Brake Map (0=None, 1=Left, 2=Right)
//6 Wheel Radius (feet)
//7 Steer Angle (degrees)
//8 Static Compression (feet) (0 if rigid)
//9 Max/Static Compression Ratio
//10 Damping Ratio (0=Undamped, 1=Critically Damped)
//11 Extension Time (seconds)
//12 Retraction Time (seconds)
//13 Sound Type
//14 Airspeed limit for retraction (KIAS)
//15 Airspeed that gear gets damage at (KIAS)

;Gear/Floats
point.0 = 1, -15.756, 0.0, -2.235, 1200, 0, 0.490, 60, 0.25, 2.5, 0.65, 0, 0, 0, 0, 0
point.1 = 1, 4.859, -3.8, -7.180, 1600, 1, 1.337, 0, 0.25, 2.5, 0.65, 0, 0, 2, 0, 0
point.2 = 1, 4.859, 3.8, -7.180, 1600, 2, 1.337, 0, 0.25, 2.5, 0.65, 0, 0, 3, 0, 0
;Scrapes
point.3 = 2, 3.000, -19.750, 3.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0
point.4 = 2, 3.000, 19.750, 3.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0
point.5 = 2, 0.500, -17.025, -2.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0
point.6 = 2, 0.500, 17.025, -2.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0
point.7 = 2, -15.660, 0.000, -0.725, 800, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0
point.8 = 2, 2.445, 0.000, -3.840, 800, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0

max_number_of_points = 9

static_pitch = 13.495
static_cg_height = 5.375

gear_system_type = 4 //0=Elec, 1=Hydraulic, 2=Pneumatic, 3=Manual, 4=None/Fixed
tailwheel_lock = 1 // Boolean. DC-3 = 1 as example. Only applicable on tailwheel acft.

It's just something I slapped together tonight, so haven't had a chance to try it out yet. It looked good in ACM, though.

My formatting gets hosed on the board, but the numbers should work. It just doesn't look as "tidy" as it does in my cfg file.

I noticed the CG position was at -1, 0, 0 in the cfg file, and the aerodynamic stuff (wings, empenage, etc) were a bit aft of where they were in the actual 3D model.

The CG position sometimes - not always - affects the way the contact points interact in the sim. I know in a real aircraft it's always the case, but it's been hit-or-miss so far with FS9. Maybe FSX is a bit more realistic?

Anyway, I can take a better look at it after work tomorrow if you would like and get you something you can better test in FSX by Saturday, but for now this should be good enough to see if it basically works.

Good luck!

Jorge
Miami, FL
 
Cees, As Jorge pointed out above, its usually the contact points compression ratio (//9 Max/Static Compression Ratio).

In FS2002 and FS2004, its my experience that if the ratio for each "point" is greater than 1, the gear acts like a launch pad cannon when you try to land. :dizzy:

I'm not sure why there are so many aircraft out there with hairy compression ratios, but I'm guessing its more normal for FSX?

One thing you could check (I don't run any of the FSX series) is look at the .cfg file for a stock/default tail dragger and check that 10th variable for a good/better comp. ratio. :wiggle:


I was planning to start a [contact points] thread in the FS2004/FS2002 forum if you folks want to dive deeper into it.
If Jorge wants to be a part of it, that would be even better. :wavey: There's a lot of info to cover.
 
If Jorge wants to be a part of it, that would be even better. :wavey: There's a lot of info to cover.

Count me in! :ernaehrung004:

Platinum Wings is supposed to be a general "upgrade" to FS9 in a vintage "look" more than anything else, but I did some testing in FSX a while back. If you guys can use some of the stuff for FSX that would be great!

I have a feeling the CG's position is going to be a contributing factor in this one since it's longitudinal position is -1 and the wing's longitudinal position is aft of the 3D wing's one. That may work great for a custom air file, but somehow I have a feeling that this particular custom air file may not work too well in FSX. I hope I'm wrong since I know it takes a lot of work to get those things right, which is why I usually take a default one and "tweak" it with the cfg entries.

I'll check on the CX later tonight after work, cooking dinner, etc. :a1089:

I'll report on whether it bounces in FS9 after the changes. If it doesn't, then it should be okay in FSX. If it does bounce, then I'll have to look at it with more detail in ACM to see what can be done with the CG and the aerodynamics.

Fingers crossed!

Jorge
Miami, FL
 
Too much air pressure in the tires? :jump: Smear them with rubber cement and they'll stick to the runway!


Be very careful with this one, sudden deceleration :banghead: can cause head injuries :dizzy:

TSquare
 
Cees,

Looked at the thing tonight.

Seems everything was connected together -- CG, contacts, etc.

Worked on it for a little while and came up with the following which seems MUCH better than the default. Let me know how it works on your FSX installation since I've done it in FS9:

//========================

[fltsim.0]
title=Fokker CX 704
sim=Fokker CX
model=clean
panel=
sound=
texture=704 //texture.xxx, etc
kb_checklists=CX_check
kb_reference=Cx_ref
atc_airline=
atc_flight_number=
atc_heavy=0
atc_id=
atc_id_color=0x000000 //HEX color
atc_id_font=Verdana,-11,1,600,0 //Font, Height (11, 12, etc), 1, "Heavyness", Italic flag
atc_parking_types=
atc_parking_codes=
ui_manufacturer="Fokker"
ui_type="C-X"
ui_variation="704"
description=Fokker CX reconnaisance/light bomber aircraft of the LVA, the Aviation section of the Dutch army, first flown in 1937.
visual_damage=0

[fltsim.1]
title=Fokker CX 712
sim=Fokker CX
model=loaded
panel=
sound=
texture=712 //texture.xxx, etc
kb_checklists=CX_check
kb_reference=Cx_ref
atc_airline=
atc_flight_number=
atc_heavy=0
atc_id=
atc_id_color=0x000000 //HEX color
atc_id_font=Verdana,-11,1,600,0 //Font, Height (11, 12, etc), 1, "Heavyness", Italic flag
atc_parking_types=
atc_parking_codes=
ui_manufacturer="Fokker"
ui_type="C-X"
ui_variation="712"
description=Fokker CX reconnaisance/light bomber aircraft of the LVA , the Aviation section of the Dutch army, first flown in 1937.
visual_damage=0

[fltsim.2]
title=Fokker CX 713
sim=Fokker CX
model=nobombs
panel=
sound=
texture=713 //texture.xxx, etc
kb_checklists=CX_check
kb_reference=Cx_ref
atc_airline=
atc_flight_number=
atc_heavy=0
atc_id=
atc_id_color=0x000000 //HEX color
atc_id_font=Verdana,-11,1,600,0 //Font, Height (11, 12, etc), 1, "Heavyness", Italic flag
atc_parking_types=
atc_parking_codes=
ui_manufacturer="Fokker"
ui_type="C-X"
ui_variation="713"
description=Fokker CX reconnaisance/light bomber aircraft of the LVA , the Aviation section of the Dutch army, first flown in 1937.
visual_damage=0

[General]
atc_type=FOKKER
atc_model=
editable=1
performance="Maximum Speed : 198 mph. 172 kts.\nEngine : 640-hp RR. Kestrel II\nMaximum Range : 207 mi \nService Ceiling : 22,500 ft \nFuel Capacity : 100 gal \nEmpty Weight : 3197 lb \nMaximum Gross Weight : 4960 lb \nLength : 28.87ft \nWingspan : 39.4ft \nHeight : 10.5ft "

[forcefeedback]

;Default Parameters on all sections

;Stick Shaker Parameters
stick_shaker_magnitude=5000
stick_shaker_direction=0
stick_shaker_period=111111

;Gear Bump Parameters
gear_bump_nose_magnitude=3000
gear_bump_nose_direction=18000
gear_bump_nose_duration=250000
gear_bump_left_magnitude=2700
gear_bump_left_direction=9000
gear_bump_left_duration=250000
gear_bump_right_magnitude=2700
gear_bump_right_direction=27000
gear_bump_right_duration=250000

;Ground Bump Parameters
ground_bumps_magnitude1=1300
ground_bumps_angle1=08900
ground_bumps_intercept1=3.0
ground_bumps_slope1=0.20
ground_bumps_magnitude2=200
ground_bumps_angle2=09100
ground_bumps_intercept2=1.075
ground_bumps_slope2=0.035

;Crash Parameters
crash_magnitude1=10000
crash_direction1=01000
crash_magnitude2=10000
crash_direction2=9000
crash_period2=75000
crash_duration2=2500000

[Reference Speeds]
flaps_up_stall_speed = 46.0 //KTAS
full_flaps_stall_speed = 39.2 //KTAS
cruise_speed = 152 //KTAS
max_indicated_speed = 210 //Vne; KIAS
max_mach = 1.0 //Mmo

[flight_tuning]

;Value of 1.0 is the baseline.
;1.1 increases by 10%.
;0.9 decreases by 10%.

;Flight Control Effectiveness Parameters
elevator_effectiveness = 1.0 //Cmde
aileron_effectiveness = 1.0 //Clda
rudder_effectiveness = 1.0 //Cndr
elevator_trim_effectiveness = 1.0 //Cmdetr
aileron_trim_effectiveness = 1.0 //Cldatr
rudder_trim_effectiveness = 1.0 //Cndrtr

;Stability Parameters
pitch_stability = 1.0 //Cmq
roll_stability = 1.0 //Clp
yaw_stability = 1.0 //Cnr

;Lift Parameters
cruise_lift_scalar = 1.0 //CL0

;High AoA Parameters
hi_alpha_on_roll = 1.0
hi_alpha_on_yaw = 1.0

;Propeller Induced Turning Effect Parameters
p_factor_on_yaw = 0.5
torque_on_roll = 0.8
gyro_precession_on_roll = 0.5
gyro_precession_on_yaw = 1.0

;Drag Parameters
parasite_drag_scalar = 1.0 //Cd0
induced_drag_scalar = 1.0 //Cdi

[weight_and_balance]

;Dimensions: Lon, Lat, Ver

max_gross_weight = 6393.398 //Pounds
empty_weight = 3086.468 //Pounds (Acft less pax, cargo, and fuel).

reference_datum_position = 0, 0, 0 //Feet
empty_weight_CG_position = 2, 0, 0 //Feet

station_load.0 = "200, -1.85, 0, 0.5, Pilot" //Pounds, Ft, Ft, Ft, String
station_load.1 = "200, -4.35, 0, 0.5, Observer" //Pounds, Ft, Ft, Ft, String

max_number_of_stations = 2 //Max number of stations to look for/show.

;Moments of Inertia
;MOI=EmptyWeight*(D^2/K)

empty_weight_pitch_MOI = 3479 //slug-ft^2
empty_weight_roll_MOI = 2575 //slug-ft^2
empty_weight_yaw_MOI = 4870 //slug-ft^2
empty_weight_coupled_MOI = 0 //slug-ft^2

[fuel]
;Lon, Lat, Ver in feet, usable in usgal, un-usable in usgal

Center1 = 2.75, 0, 0, 99, 0
;Center2 = 0, 0, 0, 0, 0
;Center3 = 0, 0, 0, 0, 0
;LeftMain = 0, 0, 0, 0, 0
;LeftAux = 0, 0, 0, 0, 0
;LeftTip = 0, 0, 0, 0, 0
;RightMain = 0, 0, 0, 0, 0
;RightAux = 0, 0, 0, 0, 0
;RightTip = 0, 0, 0, 0, 0
;External1 = 0, 0, 0, 0, 0
;External2 = 0, 0, 0, 0, 0

fuel_type = 1 //1=AvGas; 2=JetA

number_of_tank_selectors = 1 //Max 4; <=# of engines

electric_pump = 1 //Boolean. Only 1 allowed.

;added by air file?
;only in FSX SDK, but may be undocumented feature of FS2004.
engine_driven_pump = 1
manual_transfer_pump = 0 //Lockheed_Vega has one.
anemometer_pump = 0 //Vickers_Vimy has one. Needs anemometer entry below.

[GeneralEngineData]

engine_type = 0 //0=Piston; 1=Jet; 2=None; 3=Helo-Turbine; 4=Rocket

engine.0 = 7.5, 0, 0 //lat, lon, ver
;engine.1 = //lat, lon, ver
;engine.2 = //lat, lon, ver
;engine.3 = //lat, lon, ver

fuel_flow_scalar = 1.38 //1.0=normal; 0.9=10% less; 1.1=10% more
min_throttle_limit = 0.0 //0=normal; -0.25=rev thrust of 25% (jets/turboprops)

max_contrail_temperature = -5 //vapor trail temp in C*.
master_ignition_switch = 0 //Boolean.

[piston_engine]

power_scalar = 1.0 //Percent up or down. 1.0=baseline
cylinder_displacement = 108.012 //Cubic Inches.
compression_ratio = 6.0 //From Engine Info
number_of_cylinders = 12 //Total number of cylinders
number_of_magnetos = 2 //1 or 2 per engine.
max_rated_rpm = 2900 //Red Line RPM
max_rated_hp = 658.4418 //Max rated BHP
fuel_metering_type = 1 //0=Fuel Inj; 1=Gravity Carb; 2=Aerobatic
cooling_type = 1 //0=Air; 1=Liquid
normalized_starter_torque = 0.0792 //Torque to start eng. Normally 0.3

turbocharged = 1 //Boolean.
max_design_mp = 54 //Max MP given by turbocharger in inHg
min_design_mp = 10 //Min MP in inHg
critical_altitude = 14435.65 //Alt where TC will give max MP in feet.

emergency_boost_type = 0 //0=None; 1=Water; 2=Water/Meth; 3=WEP
emergency_boost_mp_offset = 0 //Additional MP supplied by boost.
emergency_boost_gain_offset = 0 //Multipier on MP from boost.

fuel_air_auto_mixture = 0 //Boolean
auto_ignition = 0 //Boolean

max_rpm_mechanical_efficiency_scalar = 1.0 //Percentage scale as above.
idle_rpm_mechanical_efficiency_scalar = 1.0 //Percentage scale as above.
max_rpm_friction_scalar = 1.0 //Percentage scale as above.
idle_rpm_friction_scalar = 1.0 //Percentage scale as above.

;Not in SDK but placed in cfg file automatically somehow.
BestPowerSpecificFuelConsumption = 0.5 //Unknown. Default: 0.5
detonation_onset = 46.2 //MP where detonation starts? Unconfirmed. Default: 37.4

[propeller]

thrust_scalar = 1.0 //Scalar as above.
propeller_type =1
propeller_diameter =10.900000
propeller_blades =4
propeller_moi =20.2584375

beta_max =22.000000
beta_min =20.000000
min_gov_rpm =0.000000
prop_tc =0.000000

gear_reduction_ratio =1.580000
fixed_pitch_beta =21.000000
low_speed_theory_limit =80.000000

prop_sync_available =0
prop_deice_available =0

prop_feathering_available = 0 //Boolean
prop_auto_feathering_available = 0 //Boolean

min_rpm_for_feather = 0 //Min RPM at which feathering possible.
beta_feather = 0 //Prop angle when feathered.
power_absorbed_cf = 0 //Coefficient. NFI.

defeathering_accumulators_available = 0 //Boolean to come out of feather.
feathering_switches = 0 //Boolean as in DC-3.

prop_reverse_available = 0 //Scalar where 0=None and 1.0=100% prop thrust.
minimum_on_ground_beta = 0 //Min blade angle on ground.
minimum_reverse_beta = 0 //Min blade angle in rev.

number_of_propellers = 1 //Generally same as eng.

;Generally the same lon, lat, ver, as the eng.
engine_map = 0,1,2,3 //Engine Map (0,1,2,3)
propeller.0 = 11.25,0,0 //lon, lat, ver
;propeller.1 = //lon, lat, ver
;propeller.2 = //lon, lat, ver
;propeller.3 = //lon, lat, ver

;Used by many to change animation of prop w/o affecting physics.
prop_anim_ratio = 0.96 //Not in SDK.

;FS2004 was last to use to tell sim which way to spin prop.
;Doesn't affect the physics.
;Found in Vickers_Vimy.
rotation = 1, 1, 1, 1 //Neg is British-style; Pos is American-style

;[TurbineEngineData]

;fuel_flow_gain = 0.0025 //Fuel flow gain constant. 0.0025 standard.
;inlet_area = 4.2895 //Engine nacelle inlet area square feet.
;rated_N2_rpm = 29920 //2nd stage (N2) max rated RPM. 29920 standard.
;static_thrust = 3500 //Max rated thrust lbs at sea level. Turboprops generally about 150.
;afterburner_available = 0 //Boolean
;reverser_available = 0 //Scalar where 0 is none and 1.0 is theoretical normal.

;[jet_engine]

;thrust_scalar = 1.0 //Scales calculated thrust from data in [TurbineEngineData] section.

;[turboprop_engine]

;power_scalar = 1.0 //Same as other sections. Power available to turn prop.
;maximum_torque = 3270 //Max shaft torque in ft-lbs.

[contact_points]

//0 Class 0 = None
// 1 = Wheel
// 2 = Scrape
// 3 = Skid
// 4 = Float
// 5 = Water Rudder
//1 Longitudinal Position (feet)
//2 Lateral Position (feet)
//3 Vertical Position (feet)
//4 Impact Damage Threshold (Feet Per Minute)
//5 Brake Map (0=None, 1=Left, 2=Right)
//6 Wheel Radius (feet)
//7 Steer Angle (degrees)
//8 Static Compression (feet) (0 if rigid)
//9 Max/Static Compression Ratio
//10 Damping Ratio (0=Undamped, 1=Critically Damped)
//11 Extension Time (seconds)
//12 Retraction Time (seconds)
//13 Sound Type
//14 Airspeed limit for retraction (KIAS)
//15 Airspeed that gear gets damage at (KIAS)

;Gear/Floats
point.0 = 1, -15.756, 0.0, -2.235, 1200, 0, 0.490, 60, 0.25, 2.5, 0.65, 0, 0, 0, 0, 0
point.1 = 1, 4.859, -3.8, -7.180, 1600, 1, 1.337, 0, 0.25, 2.5, 0.65, 0, 0, 2, 0, 0
point.2 = 1, 4.859, 3.8, -7.180, 1600, 2, 1.337, 0, 0.25, 2.5, 0.65, 0, 0, 3, 0, 0
;Scrapes
point.3 = 2, 3.000, -19.750, 3.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0
point.4 = 2, 3.000, 19.750, 3.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0
point.5 = 2, 0.500, -17.025, -2.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0
point.6 = 2, 0.500, 17.025, -2.100, 800, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0
point.7 = 2, -15.660, 0.000, -0.725, 800, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0
point.8 = 2, 2.445, 0.000, -3.840, 800, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0

max_number_of_points = 9

static_pitch = 13.455
static_cg_height = 6.075

gear_system_type = 4 //0=Elec, 1=Hydraulic, 2=Pneumatic, 3=Manual, 4=None
tailwheel_lock = 1 // Boolean. DC-3 = 1 as example. Only applicable on tailwheel acft.

[gear_warning_system]
gear_warning_available = 0 //0=None, 1=Normal (Land), 2=Amphib (Water)
pct_throttle_limit = 0 //Percent below which alarm goes off. 0.0 - 1.0 range.
flap_limit_idle = 0 //Deflection which sets off alarm when throttle at idle.
flap_limit_power = 0 //Flap limit above which alarm sounds regardless of power setting.

[brakes]
parking_brake = 1 //Boolean
toe_brakes_scale = 0.65 //Scaler as above.
differential_braking_scale = 1.0 //Scaler as above.

;Not in SDK, but entered by air file.
auto_brakes = 0 //Boolean.
hydraulic_system_scalar = 0.0 //Same as above.

[airplane_geometry]
wing_area = 339.0632 //Square feet
wing_span = 36.90934 //Feet
wing_root_chord = 6.5 //Feet
wing_dihedral = 3 //Degrees
wing_incidence = 0.0 //Degrees
wing_twist = 0.0 //Degrees
oswald_efficiency_factor = 0.65 //Measure of lift effeciency of wing
wing_winglets_flag = 0 //Are winglets available?
wing_sweep = 3 //Degrees, wing leading edge

wing_pos_apex_lon = 4.15 //Feet, longitudinal distance from reference point, negative going aft
wing_pos_apex_vert = 0 //Feet, vertical distance from reference point, positive going up

htail_area = 53.04 //Square feet
htail_span = 14.33 //Feet

htail_pos_lon = -12.415 //Feet, longitudinal distance from reference point, negative going aft
htail_pos_vert = 0.94 //Feet, vertical distance from reference point, positive going up

htail_incidence = 0.00 //Degrees
htail_sweep = 16.33 //Degrees, horizontal tail leading edge

vtail_area = 13.71 //Square feet
vtail_span = 4.63 //Feet, tip to body
vtail_sweep = 29 //Degrees, vertical tail leading edge

vtail_pos_lon = -12.25 //Feet, vertical distance from reference point, positive going up
vtail_pos_vert = 0.94 //Feet

elevator_area = 26.52 //Square feet
aileron_area = 18.59 //Square feet
rudder_area = 6.85 //Square feet

elevator_up_limit = 30 //Degrees
elevator_down_limit = 20 //Degrees
aileron_up_limit = 18 //Degrees
aileron_down_limit = 18 //Degrees
rudder_limit = 20 //Degrees
elevator_trim_limit = 19.5 //Degrees

spoiler_limit = 0 //Degrees

spoilerons_available = 0 //Spoilerons Available?
aileron_to_spoileron_gain = 0 //Aileron to spoileron gain
min_ailerons_for_spoilerons = 0 //Degrees
min_flaps_for_spoilerons = 0 //Minimum flap handle position when spoilerons activate

aileron_to_rudder_scale = 0 //Ratio of rudder to aileron imput. 0.4 would mean 40% rudder imput for 100% aileron imput.

;Not in SDK. Entered by air file.
spoiler_extension_time = 0 //Sec.
spoiler_handle_available = 0 //Boolean.
auto_spoiler_available = 0 //Boolean.
positive_g_limit_flaps_up = 10.5 //Load Factor.
negative_g_limit_flaps_up = -5 //Load Factor.
positive_g_limit_flaps_down = 10.5 //Load Factor.
negative_g_limit_flaps_down = -5 //Load Factor.
load_safety_factor = 1.0 //Load Factor. Generally 1.0
aircraft_length = 26.5 //Feet.
nose_position_lon = 10.75 //Feet.

[flaps.0]
type = 1 //1=Trailing, 2=Leading
span-outboard = 0 //0.0 .. 1.0
extending-time = 0 //seconds

flaps-position.0 = 0 // degrees
flaps-position.1 = 0 // degrees

damaging-speed = 0 // KIAS
blowout-speed = 0 // KIAS

lift_scalar = 0 // % of total lift at full deflection.
drag_scalar = 0 // % of total drag at full deflection.
pitch_scalar = 0 // % of total pitch at full deflection.
system_type = 4 //1=Hyd, 2=Pneu, 3=Man, 4=None

[electrical]
;
;Default min voltage = 0.7 * Max Batt Voltage.
;16.8 MinVolts for 24V Battery.
;Bustype
;0 = Main Bus
;1 = Avionics Bus
;2 = Battery Bus
;3 = Hot Battery Bus
;4 = Gen/Alt Bus #1 (Engine#1)
;5 = Gen/Alt Bus #2 (Engine#2)
;6 = Gen/Alt Bus #3 (Engine#3)
;7 = Gen/Alt Bus #4 (Engine#4)

max_battery_voltage = 24.0 //Max volts for battery
generator_alternator_voltage = 28.0 //Volts provided by generator/alternator
max_generator_alternator_amps = 60.0 //Amps provided by generator/alternator
engine_generator_map = 1, 0, 0, 0 //Boolean flag determining what eng have a gen/alt on them.
electric_always_available = 0 //Boolean. If (1), elec always available.

flap_motor = 0, 5, 17 //Bustype, max amp load, min volt required.
gear_motor = 0, 5, 17
autopilot = 0, 5, 17
avionics_bus = 0, 10, 17
avionics = 1, 5, 17
pitot_heat = 0, 2, 17
additional_system = 0, 20, 17
marker_beacon = 1, 2, 17
gear_warning = 0, 2, 17
fuel_pump = 0, 5, 17

starter1 = 0, 20, 17
starter2 = 0, 20, 17
starter3 = 0, 20, 17
starter4 = 0, 20, 17

light_nav = 0, 5, 17
light_beacon = 0, 5, 17
light_landing = 0, 5, 17
light_taxi = 0, 5, 17
light_strobe = 0, 5, 17
light_panel = 0, 5, 17
light_cabin = 0, 5, 17

prop_sync = 0, 15, 17
auto_feather = 0, 15, 17
auto_brakes = 0, 15, 17

standby_vacuum = 0, 15, 17

hydraulic_pump = 0, 2, 17
fuel_transfer_pump = 0, 5, 17

propeller_deice = 0, 5, 17

light_recognition = 0, 5, 17
light_wing = 0, 5, 17
light_logo = 0, 5, 17

directional_gyro = 0, 5, 17
directional_gyro_slaving = 0, 5, 17

[pitot_static]
vertical_speed_time_constant = 1 //Increasing this value will cause a more instantaneous reaction in the VSI

;Not in SDK. Put in by air file.
pitot_heat = 1 //Boolean.

[exits]
number_of_exits = 1 //Total number.
exit_rate.0 = 0.4 //Percent per second.

[Views]
eyepoint = -2.0, 0.0, 2.0 //lon, lat, ver

[lights]
;
;1 – Beacon
;2 – Strobe
;3 – Navigation or Position
;4 – Cockpit
;5 – Landing
;6 – Taxi
;7 – Recognition
;8 – Wing
;9 – Logo
;10 – Cabin
;
light.0 = 3, 2.84, -19.42, 3.60, fx_navred //bus, lon, lat, ver, effect
light.1 = 3, 2.84, 19.42, 3.60, fx_navgre //bus, lon, lat, ver, effect
light.2 = 3, -11.24, 0.00, 1.86, fx_navwhi //bus, lon, lat, ver, effect
light.3 = 4, -0.75, 0.00, 1.00, fx_vclight //bus, lon, lat, ver, effect

[keyboard_response]
;Default values throughout
//Breakpoint speeds (knots) on the keyboard increments of control surfaces.
//Speed at which the incremenet is reduced to 1/2 and 1/8 respectively.
elevator = 150, 250 //Square feet
aileron = 150, 250 //Square feet
rudder = 150, 250 //Square feet

[Radios]
// Radio Type = availiable, standby frequency, has glide slope
Audio.1 = 1
Com.1 = 1, 0
Com.2 = 1, 0
Nav.1 = 1, 0, 1
Nav.2 = 1, 0, 0
Adf.1 = 1
Adf.2 = 1
Transponder.1 = 1
Marker.1 = 1

[smokesystem]
;smoke.0 = 0, 0, 0, fx_smoke_w //long, lat, vert position

[effects]
wake = fx_wake
water = fx_spray
waterspeed = fx_spray
dirt = fx_tchdrt
concrete = fx_sparks
touchdown = fx_tchdwn_s, 1
Contrail = fx_smoke_medium //contrail effect with temp setting above.
startup = fx_engstrt_vega
;landrotorwash = //Helo only
;waterrotorwash = //Helo only

windshield_rain_effect_available = 1 // rain effect during bad weather on 2D panel.

[hydraulic_system]
engine_map = 1, 0, 0, 0 //Boolean to engines; 1-4.
normal_pressure = 732 //Normal pressure in psi.
electric_pumps = 0 //Num of elec pumps acft equipped with.

[stall_warning]
;0=None; 1=Suction; 2=Electric
type = 1 //Fuel type: 1 = Avgas, 2 = JetA
stick_shaker = 0 //0 - 10000. Not in SDK. Entered by air file.

[anemometers]
;Not in SDK. Assume=Lon, Lat, Ver.
;From Spirit_of_St_Louis cfg file.
anemometer.0 = 27, 0.0, -15

[direction_indicators]
;Type: 0=None, 1=Vac, 2=Elec, 3=Electro-Mag Slaved Compass, 4=Slaved to another.
;Number: Indicator number of slaving indicator if Type = 4
;Theoretically can have (5) types including an earth induction compass.

;Type, Number
direction_indicator.0=2,0 //Type, Slaved to if applicable.

;Not in SDK. Used in Spirit_of_St_Louis.
induction_compass.0=2 //1=Electric, 2=Anemometer Driven

[attitude_indicators]
attitude_indicator.0 = 2 //0=None; 1=Vacuum; 2=Electric

[turn_indicators]
turn_indicator.0 = 2 //0=None; 1=Vacuum; 2=Electric

[airspeed_indicators]
airspeed_indicator.0 = 1.0, 0.0 //Scalar then Offset for CAS to IAS

;Scalar is percentage with 1.0 being normal (x1).
;Offset is in knots.

[autopilot]

;General
autopilot_available = 1 //Boolean.
flight_director_available = 0 //Boolean.
attitude_indicator = 0 //Which att ind referenced by AP. (0,1,2, etc.)
direction_indicator = 0 //Which dir ind referenced by AP. (0,1,2, etc.)

;Vertical Modes
;0=None; 1=Pitch Hold; 2=Altitude Hold
default_pitch_mode = 2 //0=None, 1=Pitch, 2=Alt.
pitch_takeoff_ga = 8 //Degrees
max_pitch = 10 //Degrees
max_pitch_acceleration = 1.0 //Degrees/sec^2
max_pitch_velocity_lo_alt = 2.0 //Degrees/sec
max_pitch_velocity_hi_alt = 1.5 //Degrees/sec
max_pitch_velocity_lo_alt_breakpoint = 20000 //Feet
max_pitch_velocity_hi_alt_breakpoint = 28000 //Feet
default_vertical_speed = 500 //Feet/min

;Lateral Modes
;0=None; 1=Wing Level; 2=Current Hdg
default_bank_mode =2 //0=None, 1=Leveler, 2=Hdg
max_bank =20 //Max bank for AP.
max_bank_acceleration =1.8 //degrees/sec squared.
max_bank_velocity =3.0 //degrees/sec
yaw_damper_gain =0 //proportional gain on yaw damper yaw rate error.

;Speed Modes
autothrottle_available = 0 //Boolean
autothrottle_arming_required = 0 //Boolean
autothrottle_max_rpm = 90 //% of max eng speed to maintain at any time.
autothrottle_takeoff_ga = 0 //Boolean
max_throttle_rate = 0.1 //Percent of full throttle movement in % per second.

;Navigation Modes
;
;Proportional/Integral/Derivative (PID) Controllers
;Setting to "0" disables component.
;
nav_proportional_control = 9 //This is a "constant"
nav_integrator_control = 0.25 //This is a "constant"
nav_derivative_control = 0 //This is a "constant"

nav_integrator_boundary = 2.5 //Degrees
nav_derivative_boundary = 0 //Degrees. Inactive here.

gs_proportional_control = 9.52 //This is a "constant"
gs_integrator_control = 0.26 //This is a "constant"
gs_derivative_control = 0 //This is a "constant"

gs_integrator_boundary = 0.7 //Degrees
gs_derivative_boundary = 0 //Degrees. Inactive here.

;Misc Default AP Modes
;Legacy FS2002 still supported in FS2004.
;These are over-ridden above.
;May be commented or omitted, but if here must be set to "0".
use_no_default_pitch = 0
use_no_default_bank = 0

;The following are not in the SDK.
;Many are added by air file after acft loaded in the sim.
;Cleaned up for better readability and editing if needed.
;Some covered in FSX SDK in some cases.
;Some are from CFS2.
;May have limited use for FS2004, but have seen in some aircraft.

[folding_wings]
;One of:
;0: None (the default)
;1: Manual
;2: Pneumatic
;3: Electrical
;4: Hydraulic

wing_fold_system_type = 0 //From above.
fold_rates = 0 //Percent per second.

[TailHook]
tailhook_length = 0 //(feet)
tailhook_position = 0,0,0 //(feet) longitudinal, lateral, vertical positions from datum
cable_force_adjust = 1.0 //Generally 1.0

[GPWS]
max_warning_height = 0 //Height below which system is active.
sink_rate_fpm = -1500 //Warning active.
excessive_sink_rate_fpm = -2000 //Urgent warning active.
climbout_sink_rate_fpm = -100 //During climbout.
flap_and_gear_sink_rate_fpm = -100 //During climbout.

[Water Ballast System]
;Default FSX Sailplane.
tank.0 = 0, 0, 0
tank.1 = 0, 0, 0
tank.2 = 0, 0, 0
tank.3 = 0, 0, 0
tank.4 = 0, 0, 0
tank.5 = 0, 0, 0

NumberOfReleaseValves = 0 //Valves on aircraft.
DumpRate = 0.0000 //Rate (Gallons/Second)

[pneumatic_system]
max_pressure = 0 //System PSI.
bleed_air_scalar = 1 //Ratio from engines to system.

[deice_system]
;
;Type of deicing system available.
;0 = None
;1 = Heated Leading Edge
;2 = Bleed Air Boots
;3 = Eng Pump Boots.
structural_deice_type = 0

[vacuum_system]
;
;Type:
;0 = None
;1 = Engine pump (default)
;2 = Pneumatic
;3 = Venturi
max_pressure = 5.15 //System PSI.
vacuum_type = 1 //Type from list above.
electric_backup_pressure = 0 //PSI provided by electric backup if it's installed.
engine_map = 1, 0, 0, 0 //Boolean for each engine.

[yaw_string]
yaw_string_available = 0 //Boolean. Used in FSX glider.

[AirWrench]
Aircraft_Length=33.15000
Vmax_sl=230.00000
Vmax_ca=236.10000
V_rc=108.70000
Climb_Rate=3512.60000
Climb_Weight=4121.00000
Max_gforce=3.70000
Emergency_hp=640.00000
VSI_Weight=3527.00000
static_margin=0.13000
nose_position_lon=11.60000
ActualIncidence=0.00000
ActualTwist=0.00000
ActualTailIncidence=0.00000
Aircraft_Type=2
FlowCorrection=1.00000
ReheatCutoff=1.20000
OptimumMach=0.90000
Power_Calibration=1.00000
IdleRPM=725.00000
piston_research=0.00000
JetAltitude=0.00000
turboprop_critical_altitude=0.00000
target_roll_Vopt=152.00000
target_roll_rate=46.00000
pitch_damping=1.00000
yaw_damping=1.00000
weathervane=1.00000
elevator_scalar=1.00000
aileron_scalar=1.00000
rudder_scalar=1.00000
dihedral_scalar=1.00000
sideslip_scalar=1.00000
prop_yaw_damping_scalar=1.00000
Elevator_FF=130.00000
Aileron_FF=-150.00000
Roll_Response=30.00000
Adverse_Yaw=100.00000
Control_Response=100.00000
V_Max_Control=241.66359
V_Zero_Control=483.32718
V_Max_RdrControl=241.66359
V_Zero_RdrControl=483.32718
Spin_Stability=100.00000
Roll_Off=0.00000
glide_ratio=22.63776
CritAoA=16.00000
ClAoA_k0=1.00000
ClAoA_k1=1.00000
ClAoA_k2=0.85000
ClAoA_k3=0.80000
Elevator_Propwash=1.00000
Rudder_Propwash=1.00000
afterburner_thrust=0.00000
prop_design_altitude=5000.00000
prop_material_type=1
protect_airfile=0
spoiler_type=0
spoiler_cd=0.00000
spoiler_cl=0.00000
spoiler_cm=0.00000
auto_flaps_enabled=0
flaps_type=1
flaps_cd_scalar=0.64300
flaps_cm_scalar=0.08000
vfe_enabled=0
gear_cd_scalar=0.12000
gear_cm_scalar=0.00000
critical_mach_number=0.80000
max_mach_cd0=60
direct_edit_drag=0
cylinder_head_temperature=501.00000
exhaust_gas_temperature=1201.00000
fuel_pressure=16.50000
oil_pressure=45.00000
oil_temperature=241.00000
radiator_temperature=211.00000
lo_rpm_friction=1.00000
hi_rpm_friction=1.00000
exhaust_pressure_ratio=0.00000
interstage_turbine_temperature=-459.00000
knots_flag=0
cfs1_flag=0
cfs2_flag=0
AI_flag=0
edit_tp_torque=0
direct_edit_mach=0
direct_edit_2dtab=0
fixed_wing_pos=0
range_est_alt=12000.00000
range_est_rpm=2900.00000
range_est_mp=25.00000
range_est_fuel=99.00000
contact_light_flags=0

//========================

I basically just kept the air file that came with it and tweaked some things in the cfg file after running it through ACM first. I basically have a template I use to update the cfg file. I just comment out what I don't need. Helps when messing with Whittle, Me262, Salamander, and the like since I don't have to look around the SDK for jet stuff.

I think the AirWrench stuff from the original cfg file over-wrote my comments in the prop section, but the plane handles similar to the original upload. It just doesn't bounce all over the place.

I also found that I get a nice "wobble" when idling the engine on the ground in the VC if using active camera. Not sure if it will do the same with the FSX version of the head shake. The wobble goes away with power added. I noticed the same thing with the Northrop Alpha update I did a while back, but I thought it was something I did wrong. Turns out it may have to do with separating the engine from the prop location. Now you can make it feel like you're in an airplane with an engine running!

Let us know how this works with FSX!

Regards,

Jorge
Miami, FL
 
Jorge,

That is so much better! I only had to adjust the height of the contact points. The bouncing is gone! Thank you so much!

:wavey:

Cees

You have a PM.
 
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