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Flow visualisation - how is this done...?

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Andy_RR

Well-Known Member
Joined
Sep 29, 2009
Messages
308
Location
Melbourne, Australia
Possibly risky link

The winglet in the above link has by some process been coated with something to allow the boundary layer flow regime to become visible and presumably fixed for a certain flight condition.

Does anyone know how this is done and with what materials, processes and methods?
 
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