AH, here it is, Basically this is for deep grilles. on others you could have it on the front bumpers, and the tips could be bent to let air get underneath to lift it up and onto the grille, then fall back down on the bumper. I didn't design this, someone else did after I explained in words what I was thinking. It's probably more practical than my initial thought because I was going off of my grille. But all grilles are not built the same, so some design effort would have to go with each individual grille.
Also, I think it'd be even better if you scooted the flap to where the blue part sat on the green part, so it would close more flush with the grille.