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AI aircraft front wheels sink into the ground.


Jay2
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Greetings,

I have an AI aircraft and its front wheels sink in to the ground (see photo). This is not a swamp.

All other AI aircraft on site function properly. Does any one have any ideas on where I can start to look for the problem? I assume it is in the aircraft.cfg file.

 

[contact_points]

point.0=1.000, -13.300, 0.00, -1.60, 2165.300, 0.000, 0.538, 12.00, 0.800, 2.500, 0.700, 0.000, 0.000,0.000000,0.000000,0.000000

point.1=1.000, 1.50, -2.920, -4.50, 1968.500, 1.000, 0.512, 0.000, 0.400, 2.500, 0.700, 0.000, 0.000, 1.000, 0.000, 0.000

point.2=1.000, 1.50, 2.920, -4.50, 1968.500, 2.000, 0.512, 0.000, 0.400, 2.500, 0.700, 0.000, 0.000, 2.000, 0.000, 0.000

point.3=4.000, -13.300, 0.00, -1.30, 2165.300, 0.000, 0.538, 12.00, 0.800, 2.500, 0.700, 0.000, 0.000,0.000000,0.000000,0.000000

point.4=4.000, 1.50, -2.920, -4.20, 1968.500, 1.000, 0.512, 0.000, 0.400, 2.500, 0.700, 0.000, 0.000, 1.000, 0.000, 0.000

point.5=4.000, 1.50, 2.920, -4.20, 1968.500, 2.000, 0.512, 0.000, 0.400, 2.500, 0.700, 0.000,

0.000, 2.000, 0.000, 0.000

 

FS2004

Thanks

Jay

Wheel_Problem1.jpg

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It would definitely be the contact points. I don't mess with contact points unless I really have to and I'm not a modeler. But this resource may help you. http://msdn.microsoft.com/en-us/library/cc526949.aspx#mozTocId38401

 

In there it should state what contact point means for what axis, etc.

 

I also think there's another option in the CFG file for the spring tension or something like that.

 

Edit -

 

Here's the exact section you want. https://docs.microsoft.com/en-us/previous-versions/microsoft-esp/cc526949%28v=msdn.10%29?redirectedfrom=MSDN#contact_points

Edited by CRJ_simpilot
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Hi,

 

If you mean static_cg_height, that only has effect in slew mode, as does static_pitch.

 

This is what the numbers stand for:

 

//0 Class

//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)

 

I think there's an error in the main gear wheel radius setting (0.512). That entry is in ft. and it seems a little low, looking at the screenshot.

Try changing that, but backup your aircraft.cfg first.

 

Regards,

DDP.

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Problem solved.

Thanks to all for your contributions, it all helped with fixing this problem.

 

What I have found so far:

 

1) Download and read the “Aircraft Container SDK FS2004” is a must, especially the part on “Contact Points”.

 

2) There are two distinct categories in the Contact Point chart:

 

* “Contact Points” (vertical column #) - this range is: 0 – 1 – 2 – 4 – 5 – with no # limit. The first three points represent:

“Point.0=” the front wheel or the tail wheel,

“Point.1=” the left front wheel,

“Point.2=” the right front wheel.

I do not know what the other points are for.

 

* “Contact Elements” (horizontal row #) – this range is: 1 – 16, only. They establish what element is being adjusted, e.g. #4 “Vertical Position” or #7 “Wheel Radius (see SDK list). It is important to not confuse the two numbering systems of Points & Elements.

 

The “Elements” from left to right: (as per the SDK)

1- Class

2- Longitudinal Position (feet)

3- Lateral Position (feet)

4- Vertical Position (feet)

5- Impact Damage Threshold (Feet Per Minute)

6- Brake Map (0=None, 1=Left, 2=Right)

7- Wheel Radius (feet)

8- Steer Angle (degrees)

9- Static Compression (feet) (0 if rigid)

10- Max/Static Compression Ratio

11- Damping Ratio (0=Undamped, 1=Critically Damped)

12- Extension Time (seconds)

13- Retraction Time (seconds)

14- Sound Type

15- Airspeed limit for retraction

16- Airspeed that gear gets damage

 

Here is what it looks like in chart form:

Jay

 

Contact Points.jpg

 

Raised Wheel.jpg

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