Thread: Ideas for aero-ing a piano hinge?
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Old 06-22-2022, 05:09 PM   #6 (permalink)
freebeard
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Quote:
All I come up with is flaps ahead of the opening that create a variable bellmouth.
Like that then. Technically, not speed holes but a semipermeable membrane.



One hinge in the middle of a split flap?
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