'thrust' is not a member of UnityEngine.Component

var pitchSpeed : float = 100.0; //vertical rotation speed

var yawSpeed : float = 100.0; //horizontal rotation speed

var accelerate : float = 20000; //main engine thrust

var velocity;

var rotSpeed = 15;

var planform;

var thrust : float = 0; var maxThrust : float = 600000;

var liftFactor : float = 0.1;

private var player : GameObject;

private var speed : float = 0;

private var thrust : float = 0;

function Start() { player = GameObject.FindWithTag("Player"); }

function OnGUI () { var groundHit : RaycastHit; Physics.Raycast( player.transform.position - Vector3.up, -Vector3.up, groundHit );

 var playerScript = player.GetComponent("Player");
 
 speed = playerScript.rigidbody.velocity.z;
 thrust = playerScript.thrust;
 
 GUI.Label( Rect( 0, 0, 256, 256 ), Mathf.Round( groundHit.distance ) + " m" );
 
 GUI.Label( Rect( 0, 20, 128, 128 ), Mathf.Round( thrust ) + " N" );
 
 GUI.Label( Rect( 0, 40, 128, 128 ), Mathf.Round( speed ) + " m/s" );