1 (1)

Class

Integer defining the type of contact point:  0 = None, 1 = Wheel, 2 = Scrape, 3 = Skid, 4 = Float, 5 = Water Rudder

2 (-18.0)

Longitudinal Position

The longitudinal distance of the point from the defined reference datum (feet).  Positive is forward (out the nose).

3 (0)

Lateral Position

The lateral distance of the point from the defined reference datum (feet).  Positive is starboard (right, as viewed from the top with the airplane pointing “up”).

4 (-3.35)

Vertical Position

The vertical distance of the point from the defined reference datum (feet).  Positive is up.

5 (3200)

Impact Damage Threshold

The speed at which an impact with the ground can cause damage (feet/min).

6 (0)

Brake Map

Defines which brake input drives the brake (wheels only).  0 = None, 1 = Left Brake, 2 = Right Brake.1

7 (0.50)

Wheel Radius

Radius of the wheel (feet). 

8 (180)

Steering Angle

The maximum angle (positive and negative) that a wheel can pivot (degrees).

9 (0.25)

Static Compression

This is the distance a landing gear is compressed when the empty aircraft is at rest on the ground (feet).  This term defines the “strength” of the strut, where a smaller number will increase the “stiffness” of the strut.

10 (2.5)

Ratio of Maximum Compression to Static Compression

Ratio of the max dynamic compression available in the strut to the static value.  Can be useful in coordinating the “compression” of the strut when landing.

11 (0.90)

Damping Ratio

This ratio describes how well the ground reaction oscillations are damped.  A value of 1.0 is considered critically damped, meaning there will be little or no osciallation.  A damping ratio of 0.0 is considered undamped, meaning that the oscillations will continue with a constant magnitude.  Negative values result in an unstable ground handling situation, and values greater than 1.0 might also cause instabilities by being “over” damped.  Typical values range from 0.6 to 0.95.

12 (1.0)

Extension Time

The amount of time it takes the landing gear to fully extend under normal conditions (seconds).  A value of zero indicates a fixed gear.

13 (4.0)

Retraction Time

The amount of time it takes the landing gear to fully retract under normal conditions (seconds).  A value of zero indicates a fixed gear.

14 (0)

Sound Type

This integer value will map a point to a type of sound:

0 = Center Gear,

1 = Auxiliary Gear,

2 = Left Gear,

3 = Right Gear,

4 = Fuselage Scrape,

5 = Left Wing Scrape,

6 = Right Wing Scrape,

7 = Aux1 Scrape,

8 = Aux2 Scrape,

9 = Tail Scrape.

15 (0)

Airspeed Limit

This is the speed at which landing gear extension becomes inhibited (knots).  Not used for scrape points or non-retractable gear.

16 (200)

Damage from Airspeed

The speed above which the landing gear accrues damage (knots).  Not used for scrape points or non-retractable gear.