Adding thrust to rover wheels?

[owen102]

Okay so in the later days of .21 i decided to start modifying parts to better suit my needs. One of these projects was attempting to add thrust to wheels so that the rover sticks to the ground. i started by copying the engine component from the standard ion engine to the config file of the rover wheels but that didnt seem to work even with infinite fuel and hacked gravity. i am wondering if i did something wrong or does the game code not allow adding thrust to wheels as im trying to do.

sorry for all the scrolling, these wheels have a big .cfg file

PART
{
name = roverWheel4
module = Part
author = Squad

mesh = model.mu
scale = 1

node_attach = 0.3093255, 0.322, 0.00, 1.0, 0.0, 0.0, 1
TechRequired = fieldScience
entryCost = 5200
cost = 450
category = Utility
subcategory = 0
title = RoveMax Model M4
manufacturer = Kerbal Motion LLC
description = After years of outcry against the lack of proper powered wheels, a small startup company named Kerbal Motion was founded and delivered just what the public wanted - the RoveMax Model 1 powered rover wheel. Now with a vectored ion thrust nozzle to keep your rover firmly planted on the ground!

attachRules = 0,1,0,1,0

mass = 0.09
dragModelType = default
maximum_drag = 0.6
minimum_drag = 0.4
angularDrag = 2
crashTolerance = 14
maxTemp = 3600 
stagingIcon = LIQUID_ENGINE

crashTolerance = 100
breakingForce = 100
breakingTorque = 100

MODULE
{
	name = ModuleEngines
	thrustVectorTransformName = thrustTransform
	exhaustDamage = False
	ignitionThreshold = 0.1
	minThrust = 0
	maxThrust = 1000
	heatProduction = 0
	PROPELLANT
	{
		name = ElectricCharge
       		ratio = 1.0
	}
	PROPELLANT
	{
		name = XenonGas
		ratio = 0.1
	}
	atmosphereCurve
 	{
   	 key = 0 4200
 	}

}

MODULE
{
	name = ModuleWheel
	hasMotor = true
	resourceName = ElectricCharge
        resourceConsumptionRate = 2.0
	canSteer = true
	controlAxisType = Forward
	steeringModeType = AutomaticSteer
	brakeTorque = 300
	brakeSpeed = 1.2
	impactTolerance = 200
	overSpeedDamage = 120
	WHEEL
	{
	    wheelName = wheel
	    wheelColliderName = wheelCollider
	    suspensionTransformName = suspensionTraverse
	    suspensionNeutralPointName = suspensionNeutralPoint
	    damagedObjectName = bustedwheel
	    rotateX = 0
	    rotateY = 1
	    rotateZ = 0
	}

	steeringCurve
 	{
   	 key = 0 16
	 key = 10 9
  	 key = 30 2
 	}

	torqueCurve
	{
	  key = 0 250 0 0
	  key = 80  100 0
          key = 100 50 0 0
	  key = 120 0 0 0
	}

}

MODULE
{
	name = FXModuleLookAtConstraint
	CONSTRAINLOOKFX
	{
		targetName = susp2-1
		rotatorsName = susp2-2
	}

	CONSTRAINLOOKFX
	{
		targetName = susp2-2
		rotatorsName = susp2-1
	}

	CONSTRAINLOOKFX
	{
		targetName = susp1-2
		rotatorsName = susp1-1
	}

	CONSTRAINLOOKFX
	{
		targetName = susp1-1
		rotatorsName = susp1-2
	}

	CONSTRAINLOOKFX
	{
		targetName = susp3-1
		rotatorsName = susp3-2
	}

	CONSTRAINLOOKFX
	{
		targetName = susp3-2
		rotatorsName = susp3-1
	}

}

MODULE
{
	name = FXModuleConstrainPosition
	matchRotation = true
	matchPosition = false
	CONSTRAINFX
	{
		targetName = steering
		moversName = trackSteering
	}

}
}

Edited October 19, 2013 by Supernovy

[Nazari1382]

The engine needs a place to thrust from. The module is looking for an empty game object named thrustTransform (you can simply create a game object and give it this name, and rotate it so that the object's Z axis is pointing up. You need to use Unity to do this. You could also just try giving your wheel more mass, which can be done in the .cfg.

[Supernovy]

Or you could try using Model Nodes to put an engine in there, that'd give you a thrustTransform without having to deal with Unity.

EDIT: I also put your config file in [noparse]

[/noparse] tags to alleviate some of the scrolling.

[KhaosCorp]

Takes about 3 seconds to add thrustTransform in Unity. Should also mention that its Z+ that needs to point in direction of thrust, and it also needs to be OUTSIDE any colliders (that one got me good first engine i try to make lol).

Honestly with most KSP part the Unity build is the easyest part by a long shot...