Hi Chris, well this is how it works. In your aircraft.cfg file you'll find a bit that says;
[contact_points]
point.0=1.00, 7.60, 0.00, -2.22, 1574.8, 0.0, 0.551195, 35.0, 0.278, 1.75, 0.60, 4.00, 4.00, 0, 0.0, 0.0
point.1=1.00, -2.48, -5.32, -2.57, 1574.8, 1.0, 0.745050, 0.0, 0.369, 1.55, 0.50, 5.00, 5.00, 2, 0.0, 0.0
point.2=1.00, -2.48, 5.32, -2.57, 1574.8, 2.0, 0.745050, 0.0, 0.369, 1.55, 0.50, 6.00, 6.00, 3, 0.0, 0.0
point.3=2.00, -0.9, -17.7, 1.27, 1574.8, 0.00, 0.0000, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 5.00, 0.00, 0.00
point.4=2.00, -0.9, 17,7, 1.27, 1574.8, 0.00, 0.0000, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 6.00, 0.00, 0.00
point.5=2.00, -18.04, 0.00, 0.20, 1574.8, 0.00, 0.0000, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 4.00, 0.00, 0.00
point.6=2.00, 14.5, 0.00, -0.84, 1574.8, 0.00, 0.0000, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 4.00, 0.00, 0.00
Points 0,1 and 2 are your U/C
The figures after each are as follows;
//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)
So edit the third number in on those (you'll need to increase to raise the height), and you should be fine

Ozzy