If there was any possibility of reversing the direction of wing tip vortices, what would the effects be? Is there any chance of increasing the thrust or lift? For example the right wing tip produces clockwise vortices and the left wing tip produces counter clockwise vortices(Aircraft viewed from back). What will happen if we somehow reverse the directions? i.e making right wing tip produce counter clockwise vortices and left wing tip produce clockwise vortices?