[1.8.x] Riding Flying mobs help

Hi!

This is like, the 10th post in this "Help with flying mobs" thing where I end up removing them. 

But I think I know what to ask this time! 

So, I was using some code from the horse class to make the mobs rideable and while messing around I found this line of code, where the strafe, forward, and friction values need to be modified:

this.posY = ((EntityLivingBase)this.riddenByEntity).moveFlying(strafe, forward, friction);

I assume that the strafe value should be  p_70612_1_ and the forward value should be  p_70612_2_, but I don't know what to put for friction.

***Side question that doesn't really need to be answered:

Once the above question is answered, it would be awesome if I could get this info too-

What else in my class do I need to change, if anything, to make the [this.posY=etc] line do something? here's the class:

package com.darkflame.entity;

import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.monster.EntityMob;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;

public class RedCarMob extends EntityMob {

public RedCarMob(World worldIn) {
	super(worldIn);

}

public boolean interact(EntityPlayer entityplayer)
  {
    if (riddenByEntity == null || riddenByEntity == entityplayer)
    {
      entityplayer.mountEntity(this);
      return true;
    }
    else
    {
      return false;
    }
  }

public void moveEntityWithHeading(float p_70612_1_, float p_70612_2_)
{
    if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityLivingBase)
    {
        this.prevRotationYaw = this.rotationYaw = this.riddenByEntity.rotationYaw;
        this.rotationPitch = this.riddenByEntity.rotationPitch * 0.5F;
        this.setRotation(this.rotationYaw, this.rotationPitch);
        this.rotationYawHead = this.renderYawOffset = this.rotationYaw;
        p_70612_1_ = ((EntityLivingBase)this.riddenByEntity).moveStrafing * 0.5F;
        p_70612_2_ = ((EntityLivingBase)this.riddenByEntity).moveForward;
        
        if (p_70612_2_ <= 0.0F)
        {
            p_70612_2_ *= 0.25F;
        }

        this.stepHeight = 1.0F;
        this.jumpMovementFactor = this.getAIMoveSpeed() * 0.1F;

        if (!this.worldObj.isRemote)
        {
            this.setAIMoveSpeed((float)this.getEntityAttribute(SharedMonsterAttributes.movementSpeed).getAttributeValue());
            super.moveEntityWithHeading(p_70612_1_, p_70612_2_);
        }

        this.prevLimbSwingAmount = this.limbSwingAmount;
        double d1 = this.posX - this.prevPosX;
        double d0 = this.posZ - this.prevPosZ;
        float f4 = MathHelper.sqrt_double(d1 * d1 + d0 * d0) * 4.0F;

        if (f4 > 1.0F)
        {
            f4 = 1.0F;
        }

        this.limbSwingAmount += (f4 - this.limbSwingAmount) * 0.4F;
        this.limbSwing += this.limbSwingAmount;
    }
    else
    {
        this.stepHeight = 0.5F;
        this.jumpMovementFactor = 0.02F;
        super.moveEntityWithHeading(p_70612_1_, p_70612_2_);
    }
}
}

Thank you so much!