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Has there ever been a VTOL aircraft thruster that generated lift through the use of a drag force?

Momentum is conserved, which means if something goes up, something else has to go down. That's just the way it is, unless you've invented new laws of physics, which I don't think you're claiming to ...
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Has there ever been a VTOL aircraft thruster that generated lift through the use of a drag force?

No, there haven't been any VTOL aircraft that used a device like that. There's a very good reason for this: this device will produce very little, if any, lift. If exactly 50% of the air exits out of ...
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