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06-13-2019, 11:46 AM
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Join Date: Oct 2006
Location: Foley, Al
Posts: 595
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Interesting photo
I went for a quick oil stirring flight last night. The sun was setting and a rather ordinary sunset began to unfold.... the first picture. After a minute it transformed to the second picture. I can't begin to understand the what/why/how the straight and evenly spaced lines came from. Just thought I'd share this interesting photograph.
It almost looks as if they were shot on different days. I took them myself only a couple minutes apart.
__________________
Paul Gray
Foley, Alabama
N729PG..... 450+ hrs
RV 7A, Lycoming 0 320 D1A, Sensenich FP propeller
pilotforfun2001@yahoo.com
VAF supporter $$$
Last edited by Paul 5r4 : 06-13-2019 at 11:48 AM.
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06-13-2019, 12:22 PM
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Join Date: Dec 2010
Location: Redlands, CA
Posts: 179
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06-13-2019, 12:38 PM
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Join Date: Oct 2008
Location: Utah
Posts: 8,274
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Meteoptics illusion
The anticrepuscular rays maybe?  |
06-13-2019, 12:49 PM
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Join Date: Sep 2005
Location: Dothan, Alabama
Posts: 1,492
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Quote:
Originally Posted by Paul 5r4
I went for a quick oil stirring flight last night. The sun was setting and a rather ordinary sunset began to unfold.... the first picture. After a minute it transformed to the second picture. I can't begin to understand the what/why/how the straight and evenly spaced lines came from. Just thought I'd share this interesting photograph.
It almost looks as if they were shot on different days. I took them myself only a couple minutes apart.
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Send them to James Spann and ask him. I am sure he will know.
https://www.facebook.com/jamesspann/
__________________
Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
N4IDH
Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
?Mark Twain
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06-13-2019, 02:41 PM
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Join Date: Apr 2016
Location: Melbourne, Australia
Posts: 180
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__________________
Paul McVitty
Flyleds.com
VAF advertiser
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06-13-2019, 02:53 PM
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Join Date: Jan 2019
Location: Anacortes Wa
Posts: 161
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Shadows of the "Kelvin-Helmholtz" waves...
I think it the rays from the setting sun shining over a nice Kelvin wave formation (and no, I'm not making this name up either!)
They are very short lived so that explains the quick pop-up!
Very cool
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06-13-2019, 07:04 PM
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Join Date: Jan 2013
Location: Palmer Lake, CO
Posts: 232
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Interesting photo!
Paul,
What a great photo. It does look like maybe the shadow of the light hitting to Kelvin Helmholtz waves. What is cool is that the shadows appear to be associated with the trough, not the peak of the waves. Very cool in any event!
cheers
Geoff
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Geoff McHarg
2020 dues gladly sent
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06-14-2019, 12:23 AM
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Join Date: Oct 2006
Location: Foley, Al
Posts: 595
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Hey and thanks to everyone for your responses. I'm learning everyday as I've never heard of this phenomenon. Interesting stuff!
__________________
Paul Gray
Foley, Alabama
N729PG..... 450+ hrs
RV 7A, Lycoming 0 320 D1A, Sensenich FP propeller
pilotforfun2001@yahoo.com
VAF supporter $$$
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06-14-2019, 01:34 AM
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Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,227
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I saw the same phenomenon on an evening flight two weeks ago.
Before...
After...
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Jim Stricker
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 633 
LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father & CFI) - USAAF 1st Lt. Captain B-17H
Last edited by Piper J3 : 06-14-2019 at 01:36 AM.
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06-14-2019, 03:40 AM
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Join Date: Jul 2013
Location: Clarkston, MI
Posts: 707
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Amazing capture. No expert, but I specialize in sunrises and sunsets (see my YouTube channel)... and these were just beautiful.
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