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Prop Vortices  
User currently offlinealaskan9974 From United States of America, joined Oct 2011, 31 posts, RR: 0
Posted (11 months 1 day 20 hours ago) and read 1659 times:

Nearly every a/c out of here today has had vortices from the props, most pronounced with a herc that took off earlier. Originally on video, had to take a screen grab to share. What are the best conditions for these to form? Temp was in the teens and low humidity, opposite of what I thought optimal conditions were, high humidity and dewpoint close to air temp.



2 replies: All unread, jump to last
 
User currently offlinemjgbtv From United States of America, joined Jan 2008, 858 posts, RR: 0
Reply 1, posted (11 months 1 day 19 hours ago) and read 1631 times:

Judging from a quick search in the db moisture is definitely the right condition. Is that frost in the foreground of your image? Maybe the sun was evaporating a layer of moisture from off the fields?

User currently offlinejpmagero From United States of America, joined Apr 2012, 173 posts, RR: 0
Reply 2, posted (11 months 1 day 10 hours ago) and read 1579 times:
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The conditions I got these in were early morning, hazy with the fog lifting, mid-to-high 60s if I recall correctly.

http://www.flickr.com/photos/vandarix/7214689304/

http://www.flickr.com/photos/vandarix/7214689458/



John M - Aussie expat in the US
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