BuggyUpdate

void Update()
  {
        // Main Thrust
        thrust = 0.0f;
        float acceleration = Input.GetAxis("Vertical");
        if (acceleration > deadZone)
            thrust = acceleration * forwardAcceleration;
        else if (acceleration < -deadZone)
            thrust = acceleration * reverseAcceleration;

        // Turning
        turnValue = 0.0f;
        float turnAxis = Input.GetAxis("Horizontal");
        if (Mathf.Abs(turnAxis) > deadZone)
            turnValue = turnAxis;
  }