AddRelativeForce to another object

Hi Guys,

This might be really simple but it's had me stumped for about an hour now. I am trying to create a fan, which blows other games objects in which ever direction it is facing. Simple enough but I can't work out what I m doing wrong. This script;

 var force : float;
 var contact : GameObject;
 var myPos : Vector3;
 
 function FixedUpdate()
 {
     myPos = gameObject.transform.position;
 }
 
 function OnTriggerStay(other:Collider)
 {
     if(other.gameObject.tag == "Player")
     {
         contact = other.gameObject;
         contact.rigidbody.AddRelativeForce(Vector3.up * force * Time.deltaTime);
     }
 }

Adds relative force based on the orientation of the object itself, not the direction of the fan. Can some clever folk please advise, many thanks in advance!