Technical merits of different feathers?

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Kyudohund
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Post by Kyudohund » Wed Jan 05, 2011 4:37 pm

J-Boon,

the case why owl-feathers are soundless is, the bottom side is even and the upper side is somthing like "furry". As you know, the air flows faster over the upper side because its concave, so there is a small film of not moving air which causes soundlessness.

Peter
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