From: gldnbearz
The weather went against the Blue Angels this year. Saturday's
airshow was canceled about 10 minutes in due to poor visibility.
Sunday was still quite overcast. We decided to chance the weather and
another cancellation to venture out.
While waiting for the Blue Angels, we saw:
http://lh3.ggpht.com/_Nn-R2KLB88M/StQQy2pbS5I/AAAAAAAAA0w/iggTUepOVpM/s800/IMGP5140.JPG
Then Fat Albert flew out:
http://lh6.ggpht.com/_Nn-R2KLB88M/StlaYBJ8QkI/AAAAAAAAA3w/6ozBS9dE1AM/s800/IMGP5239.JPG
Can someone explain to me the effects the propellers are causing?
Looks rather neat.
Cavitation - there's a pressure drop at the trailing edge of the blade
most noticable near the tip.
If the air has enough moisture water vapor condenses there and is blown
aft by the forward motion of the aircraft.
Since the blade tips are rotating, the condensation blowing aft takes on
a spiral form.
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