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*cue the Aha moment* that makes sense now. our problem isn't "ballistic drag" which i understand. We've got a stalling wing! we're creating more lift than the "wingspeed" is capable of......right??
That's the answer i was hunting I think. We want it detached because there's nothing useful left for it to do for us, IE no spoilers or other flow-dependant airfoils or benefits to be had. we want it to be come the stable chunk of air following us, energized once and carried by momentum (like the car it's self) only adding enough energy to maintain momentm. otherwise we are constantly swaping out large amounts of air mass and having to re-energize it not only to push it out of the way, but to add it to our "sled" and get it accelerated back up to our speed as well.
Much obliged!
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