Flight Script throws no errors but does nothing.

I'm making a game in which the player can fly, but my script is not working. It seems correct, throws no errors, but still does nothing. It looks like this:

 #pragma strict
 
 static var jumpHeight = 100000000000;
 
 private static var flightParent : GameObject;
 
 Debug.Log ("Flying");
 
 public static function fly () {
 
 var flightRigidbody : Rigidbody[];
 
 
     if(flightParent == null) {
 
         flightParent = GameObject.Find("FPSController");
         Debug.Log ("Found Player to Fly");
     }
 
     flightRigidbody = flightParent.GetComponents.<Rigidbody>();
 
     for (var parentFlight : Rigidbody in flightRigidbody) {
 
         Debug.Log ("You Flapped your Wings");
         parentFlight.velocity.y = jumpHeight;
         Debug.Log ("Succesfull flight");
 
     }
 }

and is being called by:

 if (Input.GetKey(KeyCode.Space))
     {
         if (MainScript.flying == true)
         {
             FlightScript.fly ();
         }    
     }

All Debug.Logs are being thrown successfully. It may be noteworthy that the standard FPSCharacter is also being used in this project.