Android: Plane physics/movement

Hello All, I am trying to create basic plane physics for the Android device. The main problem I am having is the controls. I know about Input.acceleration but if I use the raw input then the plane gets very sensitive with every little shake or movement from the users hand. I need movement to be fluent and controllable in a hand held device while being able to see the world in front of you. Any help would be greatly appreciated. Thanks!

 var turnSpeed: float = 90;
 var moveSpeed: float = 5;
 
 private var controller :CharacterController;
 controller = gameObject.GetComponent(CharacterController); 
 
     var localRotation: Quaternion;
     var speed : float = 1.0f; 
 
 function Start() {
        localRotation = transform.rotation;
 }
 
 function FixedUpdate()
 {
         // find speed based on delta
         var curSpeed = Time.deltaTime * speed;
 
        // first update the current rotation angles with input from acceleration axis
        localRotation.y += -Input.acceleration.y * curSpeed;
        localRotation.x += Input.acceleration.x * curSpeed;
 
        // then rotate this object accordingly to the new angle
        transform.rotation = localRotation;
        var movement = Vector3.forward * Time.deltaTime * moveSpeed;
        controller.Move(movement);
 }
 
 @script RequireComponent(CharacterController)