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10th December 2004 | 05:17

#4 (permalink)

SeldomFixit

Joined: Oct 1999

Posts: 668

Likes: 0

From: Adelaide

There was/is a theory that it helps deter birdstrikes by oscillating and giving the hapless avion something to see/avoid.
Definitely helps se/avoid for any hapless plod that thinks getting up close and personal at the wrong time might be fun