Topic Author
Posts: 78
Joined: Sat Oct 01, 2011 9:06 pm

Prop Vortices

Thu Oct 24, 2013 11:55 pm

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.

Posts: 877
Joined: Mon Jan 28, 2008 2:18 am

RE: Prop Vortices

Fri Oct 25, 2013 1:08 am

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?
Posts: 179
Joined: Fri Apr 13, 2012 9:06 pm

RE: Prop Vortices

Fri Oct 25, 2013 9:38 am

The conditions I got these in were early morning, hazy with the fog lifting, mid-to-high 60s if I recall correctly.
John M - Aussie expat in the US

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