Quote:
Originally Posted by freebeard
Suppose a freewheeling or slightly draggy pinwheel on a stalk just downstream of the point where a vortex springs up. Would the pinwheel absorb energy from the vortex and dissipate it? Would the added drag eat any savings for lunch?
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I doubt this helps at all, but here is footage of a pinwheel in a wind tunnel. Starting at 19 seconds:
Toyota Windtunnel - Pinwheel on Vimeo