From TDN

VehicleData

VehicleData derives from ShapeBaseData and aids the creation of vehicle objects. Several other datablocks, such as WheeledVehicleData and FlyingVehicleData, derive from VehicleData. VehicleData defines many new fields, which are listed in the table below.

Field Name	Type	Default Value	Description
Special Effects Data
softImpactSound	AudioProfilePtr	NULL	The AudioProfile used to produce sounds for soft impacts. If specified, must point to an object of type AudioProfile. Must adhere to the semantics associated with AudioProfile*, as defined in the Torque Game Engine.
hardImpactSound	AudioProfilePtr	NULL	The AudioProfile used to produce sounds for hard impacts. If specified, must point to an object of type AudioProfile. Must adhere to the semantics associated with AudioProfile*, as defined in the Torque Game Engine.
splashFreqMod	Float	300.0	The simulated frequency modulation of a splash generated by this vehicle. Multiplied along with vehicle speed and time elapsed when determining splash emition rate.
splashVelEpsilon	Float	0.5	The threshold speed at which we consider the vehicle's movement to have stopped when updating splash effects.
splashEmitter	ParticleEmitterDataPtr (array)	NULL [VC_NUM_SPLASH_EMITTERS]	Array of pointers to ParticleEmitterData datablocks which will generate splash effects. If specified, each pointer must reference a datablock of type ParticleEmitterData. Must adhere to the semantics associated with ParticleEmitterData*, as defined in the Torque Game Engine.
exitSplashSoundVelocity	Float	2.0	The minimum velocity at which the exit splash sound will be played when emerging from water.
softSplashSoundVelocity	Float	1.0	The minimum velocity at which the soft splash sound will be played when impacting water.
mediumSplashSoundVelocity	Float	2.0	The minimum velocity at which the medium splash sound will be played when impacting water.
hardSplashSoundVelocity	Float	3.0	The minimum velocity at which the hard splash sound will be played when impacting water.
exitingWater	AudioProfilePtr	NULL	The AudioProfile will be used to produce sounds when emerging from water. If specified, must point to an object of type AudioProfile. Must adhere to the semantics associated with AudioProfile*, as defined in the Torque Game Engine.
impactWaterEasy	AudioProfilePtr	NULL	The AudioProfile will be used to produce sounds when a soft impact with water occurs. If specified, must point to an object of type AudioProfile. Must adhere to the semantics associated with AudioProfile*, as defined in the Torque Game Engine.
impactWaterMedium	AudioProfilePtr	NULL	The AudioProfile will be used to produce sounds when a medium impact with water occurs. If specified, must point to an object of type AudioProfile. Must adhere to the semantics associated with AudioProfile*, as defined in the Torque Game Engine.
impactWaterHard	AudioProfilePtr	NULL	The AudioProfile will be used to produce sounds when a hard impact with water occurs. If specified, must point to an object of type AudioProfile. Must adhere to the semantics associated with AudioProfile*, as defined in the Torque Game Engine.
waterWakeSound	AudioProfilePtr	NULL	The AudioProfile will be used to produce sounds when a water wake is displayed. If specified, must point to an object of type AudioProfile. Must adhere to the semantics associated with AudioProfile*, as defined in the Torque Game Engine.
triggerDustHeight	Float	3.0	Maximum height from the ground at which the vehicle will generate dust.
dustHeight	Float	1.0	Height of dust effects.
dustEmitter	ParticleEmitterDataPtr (array)	NULL [VC_NUM_DUST_EMITTERS]	Array of pointers to ParticleEmitterData datablocks which will be used to emit particles at vehicle/terrain contact point. If specified, must point to a datablock of type ParticleEmitterData. Must adhere to the semantics associated with ParticleEmitterData*, as defined in the Torque Game Engine.
damageEmitterOffset	Point3F (array)	(uninitialized) [VC_NUM_DAMAGE_EMITTER_AREAS]	Offset point at which to display damage effects. The number of array entries is limited by the VC_NUM_DAMAGEEMITTER_AREAS constant within the VehicleConsts enumeration as specified in the VehicleData class definition withing the Torque Game Engine.
numDmgEmitterAreas	Float	0.0	The number of areas on the vehicle that can display damage effects.
damageEmitter	ParticleEmitterDataPtr (array)	NULL [VC_NUM_DAMAGE_EMITTERS]	Array of pointers to ParticleEmitterData datablocks which will be used to emit particles for damage effects (smoke). If specified, the pointers must point to a datablock of type ParticleEmitterData. Must adhere to the semantics associated with ParticleEmitterData*, as defined in the Torque Game Engine.

Camera Data
cameraRoll	Boolean	True	Specifies whether the camera's rotation matrix, and the render eye transform are multiplied during camera updates.
cameraLag	Float	0.0	Scalar amount by which the third person camera lags the vehicle, relative to the vehicle's linear velocity.
cameraDecay	Float	0.0	Scalar rate at which the third person camera offset decays, per tick.
cameraOffset	Float	0.0	The vertical offset of the vehicle's camera.

Physics Data
integration	Integer	1	The number of discrete steps with which to process physics data per tick.
minImpactSpeed	Float	25.0	Minimum speed at which the vehicle must be travelling for the OnImpact script function to be called.
softImpactSpeed	Float	25.0	Minimum speed at which the vehicle must be travelling for the soft impact sound to be played.
hardImpactSpeed	Float	50.0	Minimum speed at which the vehicle must be travelling for the hard impact sound to be played.
massCenter	Point3F	(0.0, 0.0, 0.0)	The vehicle's rigid body center of mass.
bodyRestitution	Float	1.0	The vehicle's rigid body restitution. Used in the physical simulation during collisions. The scalar restitution value affects the strength of the body's rebound resulting from collisions with objects. Higher restitution values yield more powerful rebound reactions.
bodyFriction	Float	0.0	The vehicle's rigid body friction coefficient. Used in the physical simulation during contacts and collisions. Higher friction values dampen contact and collision forces.
contactTol	Float	0.1	The minimum collision velocity required to trigger a collision contact. Collisions with velocities less than the contactTol value will be treated as collision constraints.
collisionTol	Float	0.1	The minimum collision velocity required to trigger a full collision. Collisions with velocities less than the collisionTol value will be treated as collision contacts or constraints.
damageLevelTolerance	Float (array)	0.0 [VC_NUM_DAMAGE_LEVELS]	Array of floats specifying damage level thresholds. Each entry is specified as a decimal percentage of maxDamage (defined in ShapeBaseData). Each damage level is used to determine what damage effect to play.
maxSteeringAngle	Float	0.785	Maximum attainable steering angle, measured in radians. Steering angles are clamped to this maximum value.
minDrag	Float	0.0	The minimum drag acting on the vehicle at all times. At present, this field is only used by FlyingVehicleData and helps determine it's maxSpeed and movement force.
maxDrag	Float	0.0	Intended to clamp the maximum drag available. Note: this field currently has no tangible effect in the engine's simulation..
jetForce	Float	500.0	Force generated by the vehicle's jet, if it has one. This field is only used by derived classes.
jetEnergyDrain	Float	0.8	Energy drained per tick by use of the vehicle's jet, if it has one.
minJetEnergy	Float	1.0	Minimum energy required in order to use the vehicle's jet, if it has one..
collDamageThresholdVel	Float	20.0	Note: this field currently has no tangible effect in the engine's simulation..
collDamageMultiplier	Float	0.05	Note: this field currently has no tangible effect in the engine's simulation..
minRollSpeed	Float	0.0	Note: this field currently has no tangible effect in the engine's simulation..

Full Example Script

The current content is a copy of the data above, although a little re-aranged to make it more grouped. Please revise this before you use it for your vehicle.

datablock VehicleData(MyCar)
{
className = Vehicles;
shapeFile = "~/data/shapes/vehicles/mycar.dts";
emap = true;

splashFreqMod 	= 300.0;
splashVelEpsilon = 0.5;
splashEmitter = ParticleEmitterData;

// Audio Details
exitSplashSoundVelocity = 2.0;
softSplashSoundVelocity = 1.0;
mediumSplashSoundVelocity = 2.0;
hardSplashSoundVelocity = 3.0;

// Audio Data
softImpactSound  = NULL;
hardImpactSound = NULL;
exitingWater = NULL;
impactWaterEasy = NULL;
impactWaterMedium = NULL;
impactWaterHard = NULL;
waterWakeSound = NULL;

// Dust Emitter Details
triggerDustHeight = 3.0;
dustHeight = 1.0;
dustEmitter = ParticleEmitterData;	

// Damage Details
numDmgEmitterAreas = 0.0;
damageEmitter = ParticleEmitterData;
damageEmitterOffset[0] = "1.0 1.0 1.0";
damageEmitterOffset[1] = "1.0 1.0 1.0";
damageEmitterOffset[2] = "1.0 1.0 1.0";
//etc..

// Camera Details
cameraRoll = true;
cameraLag = 0.0;
cameraDecay = 0.0;
cameraOffset = 0.0;

//Physics Data
integration = 1; // The number of discrete steps with which to process physics data per tick.
minImpactSpeed  = 25.0;
softImpactSpeed  = 25.0;
hardImpactSpeed  = 50.0;
massCenter  = "0.0 0.0 0.0";
bodyRestitution = 1.0; 
bodyFriction = 0.0; 
contactTol = 0.1; 
collisionTol = 0.1; 
damageLevelTolerance = 0.0; 

maxSteeringAngle = 0.785; 
minDrag  = 0.0; 
maxDrag = 0.0; 
jetForce = 500.0; 
jetEnergyDrain = 0.8; 
minJetEnergy = 1.0;

// Note: These fields currently has no tangible effect in the engine's simulation..
collDamageThresholdVel = 20.0; 
collDamageMultiplier = 0.05; 
minRollSpeed = 0.0;
}