Posky 747 can't taxi on ground, any help?

I have the Posky 747-400 v4. When I try taxiing on the ground using my rudder, the plane can only turn a tiny bit before the aircraft sides dip. For instance, if I want to turn right, I can turn right only slightly, and if I turn any more, the entire right side of the airplane will dip downwards to the ground. I'm unfamiliar with aircraft.cfg manipulation, so I don't even know which values to adjust. Any advice on how to allow the aircraft to taxi normally will be appreciated.

As with most POSKY aircraft, there are always a complete set of alternate contact points. in the aircraft.cfg file. The second set have // in front of each point. Remove the // for all of them and put // in front of the other ones.

 

I did test these points for rudder steering and it did fine for left and right turns. A couple of main-mounts wheels may need some further adjustment for vertical height.

 

Example below:

 

[contact_points]

       //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)

//point.0 = 1.000,  -30.333,    0.000, -14.050, 2181.102, 0.000, 5.812,  70.000, 0.400, 1.200, 0.550, 11.000, 11.000, 0.000, 0.000, 0.000
//point.1 = 1.000, -109.583,  -18.000, -13.833, 2574.803, 1.000, 5.812,   0.000, 0.602, 0.500, 0.551, 14.900, 14.900, 2.000, 0.000, 0.000
//point.2 = 1.000, -109.583,   18.000, -13.833, 2574.803, 2.000, 5.812,   0.000, 0.602, 0.500, 0.551, 17.100, 17.100, 3.000, 0.000, 0.000
//point.3 = 2.000, -146.000, -102.900,   7.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 5.000, 0.000, 0.000
//point.4 = 2.000, -146.000,  102.900,   7.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 6.000, 0.000, 0.000
//point.5 = 2.000, -189.667,    0.000,  -2.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
//point.6 = 2.000,   -9.167,    0.000,  -5.750,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 4.000, 0.000, 0.000
//point.7 = 2.000, -229.667,    0.000,  55.500,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 8.000, 0.000, 0.000
//point.8 = 2.000, -106.400,  -69.500,  -5.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
//point.9 = 2.000,  -76.300,  -39.167,  -9.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
//point.10= 2.000,  -76.300,   39.167,  -9.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
//point.11= 2.000, -106.400,   69.500,  -5.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
//point.12= 2.000,    0.000,    0.000,   0.000,  787.402, 0.000, 0.000,   0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 4.000, 0.000, 0.000

//static_pitch= 1.000
//static_cg_height= 13.625
//gear_system_type=0

// Nose gear
point.0= 1.000, -30.333, -1.500, -17.833, 1181.102, 0.000, 2.000, 70.000, 1.859, 2.500, 0.518, 9.000, 11.000, 0.000, 240.000, 280.000
point.1= 1.000, -30.333,  1.500, -17.833, 1181.102, 0.000, 2.000, 70.000, 1.859, 2.500, 0.518, 9.000, 11.000, 0.000, 240.000, 280.000

// Main Wing Gear (left)
point.2= 1.000,  -104.583, -18.000, -16.133, 1574.803, 1.000, 2.000, -13.000, 2.602, 2.500, 0.551, 12.900, 14.900, 2.000, 240.000, 280.000
point.3= 1.000,  -104.583, -14.000, -16.133, 1574.803, 1.000, 2.000, -13.000, 2.602, 2.500, 0.551, 12.900, 14.900, 2.000, 240.000, 280.000
point.4= 1.000,   -99.583, -18.000, -16.133, 1574.803, 1.000, 2.000, -13.000, 2.602, 2.500, 0.551, 12.900, 14.900, 2.000, 240.000, 280.000
point.5= 1.000,   -99.583, -14.000, -16.133, 1574.803, 1.000, 2.000, -13.000, 2.602, 2.500, 0.551, 12.900, 14.900, 2.000, 240.000, 280.000

// Main Wing Gear (right)
point.6= 1.000,  -104.583, 18.000, -16.133, 1574.803, 2.000, 2.000, -13.000, 2.602, 2.500, 0.551, 15.100, 16.400, 3.000, 240.000, 280.000
point.7= 1.000,  -104.583, 14.000, -16.133, 1574.803, 2.000, 2.000, -13.000, 2.602, 2.500, 0.551, 15.100, 16.400, 3.000, 240.000, 280.000
point.8= 1.000,   -99.583, 18.000, -16.133, 1574.803, 2.000, 2.000, -13.000, 2.602, 2.500, 0.551, 15.100, 16.400, 3.000, 240.000, 280.000
point.9= 1.000,   -99.583, 14.000, -16.133, 1574.803, 2.000, 2.000, -13.000, 2.602, 2.500, 0.551, 15.100, 16.400, 3.000, 240.000, 280.000

// Main Center Gear (left)
point.10= 1.000, -115.583, -8.000, -16.133, 1574.803, 1.000, 2.000, 0.000, 2.602, 2.500, 0.551, 13.400, 14.900, 2.000, 240.000, 280.000
point.11= 1.000, -115.583, -4.000, -16.133, 1574.803, 1.000, 2.000, 0.000, 2.602, 2.500, 0.551, 13.400, 14.900, 2.000, 240.000, 280.000
point.12= 1.000, -109.583, -8.000, -16.133, 1574.803, 1.000, 2.000, 0.000, 2.602, 2.500, 0.551, 13.400, 14.900, 2.000, 240.000, 280.000
point.13= 1.000, -109.583, -4.000, -16.133, 1574.803, 1.000, 2.000, 0.000, 2.602, 2.500, 0.551, 13.400, 14.900, 2.000, 240.000, 280.000
//
// Main Center Gear (right)
point.14= 1.000, -115.583,  8.000, -16.133, 1574.803, 2.000, 2.000, 0.000, 2.602, 2.500, 0.551, 11.500, 17.500, 3.000, 240.000, 280.000
point.15= 1.000, -115.583,  4.000, -16.133, 1574.803, 2.000, 2.000, 0.000, 2.602, 2.500, 0.551, 11.500, 17.500, 3.000, 240.000, 280.000
point.16= 1.000, -109.583,  8.000, -16.133, 1574.803, 2.000, 2.000, 0.000, 2.602, 2.500, 0.551, 11.500, 17.500, 3.000, 240.000, 280.000
point.17= 1.000, -109.583,  4.000, -16.133, 1574.803, 2.000, 2.000, 0.000, 2.602, 2.500, 0.551, 11.500, 17.500, 3.000, 240.000, 280.000

//Scrape points
point.18 = 2.000, -146.000, -102.900,  7.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 5.000, 0.000, 0.000
point.19 = 2.000, -146.000,  102.900,  7.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 6.000, 0.000, 0.000
point.20 = 2.000, -189.667,   0.000,  -2.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
point.21 = 2.000,   -9.167,   0.000,  -5.750,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 4.000, 0.000, 0.000
point.22 = 2.000, -229.667,   0.000,  55.500,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 8.000, 0.000, 0.000
point.23 = 2.000, -106.400, -69.500,  -5.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
point.24 = 2.000,  -76.300, -39.167,  -9.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
point.25 = 2.000,  -76.300,  39.167,  -9.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
point.26 = 2.000, -106.400,  69.500,  -5.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 9.000, 0.000, 0.000
point.27 = 2.000,    0.000,   0.000,   0.000,  787.402, 0.000, 0.000,  0.000, 0.000, 0.000, 0.000,  0.000,  0.000, 4.000, 0.000, 0.000

static_pitch= -1.000
static_cg_height= 13.625
gear_system_type=0

Thanks for those contact points. I will adjust the cfg and see where it goes.