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I wonder what actuators are in use. Probably electric, but it might be possible to use air pressure at the stagnation point.
Imagine a Coanda nozzle in the air curtain and pneumatic actuator.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Necessity is the mother of invention, but simplicity is it's favorite aunt --Amish proverb
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