idahoflier
Pattern Altitude
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idahoflier
Daily Pic
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Morgan3820
En-Route
wilkersk
Pattern Altitude
NoHeat
En-Route
A phenomenon I’ve never heard of: dark sky in the shadow of a vapor trail.
The photos were taken while my plane was within the shadow of a vapor trail, and my camera was pointed along the direction of the shadow. The sunlight is coming down at a 45 degree angle from the vertical in this photo, top left toward bottom right.
You can see the shadow of the vapor trail on the ground, as a dark stripe. Like the shadow of a long skinny cloud. Not surprising.
What is surprising is that you can also see the shadow in the atmosphere itself. It’s a dark stripe in the air. It almost looks like smoke in the air, but it’s not.
physics explanation:
The blue-sky effect, which arises from Rayleigh scattering on the air, is diminished in the shadow of the vapor trail, so that the blue sky is darker within that shadow. It must be a weak effect because I could only see the dark stripe in the air while I was not only in the shadow itself, but also looking down the very long length of the shadow. I could not see it when looking across the narrow width of the shadow.
photographed today, near Elwood NE.
The photos were taken while my plane was within the shadow of a vapor trail, and my camera was pointed along the direction of the shadow. The sunlight is coming down at a 45 degree angle from the vertical in this photo, top left toward bottom right.
You can see the shadow of the vapor trail on the ground, as a dark stripe. Like the shadow of a long skinny cloud. Not surprising.
What is surprising is that you can also see the shadow in the atmosphere itself. It’s a dark stripe in the air. It almost looks like smoke in the air, but it’s not.
physics explanation:
The blue-sky effect, which arises from Rayleigh scattering on the air, is diminished in the shadow of the vapor trail, so that the blue sky is darker within that shadow. It must be a weak effect because I could only see the dark stripe in the air while I was not only in the shadow itself, but also looking down the very long length of the shadow. I could not see it when looking across the narrow width of the shadow.
photographed today, near Elwood NE.
FPK1
Line Up and Wait
KPOC to your left, Puddingstone Reservoir (lake) to your right...
And stored commercial jets at KSBD.
And stored commercial jets at KSBD.
I saw one of those yesterday coming home.
I love sunsets from the air.
What a beautiful evening, with good company too! (photo not included 
).
). 
RudyP
Cleared for Takeoff
Bill
Touchdown! Greaser!
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Well I don’t have a pic. How bout a screen pic.
Another flight around town ‘just because’. I don’t normally do that but sheeeeyit it’s been fun.
No pics either, but had the first chance to hand fly some approaches with the new GI275's. Holy cow is there a lot of information crammed into those little screens! It was a very bumpy day with some nice crosswinds on the approaches, good practice!
Nice seeing you yesterday man!
eman1200
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Bro do you even lift
how 'bout doing a video on the 275's? you know, go over the features and an approach or something like that........
Bill
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Yeah I’m game for it!
Tantalum
Final Approach
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San_Diego_Pilot
Nice! Just a hunt of prop blur, great picture! iPhone? Android? Real camera?
WannFly
Final Approach
iPhone, the new one pro max or whatever it’s called.
Skyrys62
En-Route
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Meet the Fokkers
Kate looking good as always..
Skyrys62
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Meet the Fokkers
with good company too! (photo not included
Pics or it didn't happen
Ashlyn Maria
Pre-Flight
Evening sun over KSPB.
Sent from my SM-A515U using Tapatalk
Sent from my SM-A515U using Tapatalk
Abram
Pre-takeoff checklist
Some highlights from this week’s flying!
Somewhere in North Florida winging my way South.
Sunset on the West Coast of Florida.
Sunrise over the Carribbean.
The east coast of Cuba on my wingtip.
Abram Finkelstein
N685AS
Somewhere in North Florida winging my way South.
Sunset on the West Coast of Florida.
Sunrise over the Carribbean.
The east coast of Cuba on my wingtip.
Abram Finkelstein
N685AS
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edessa
Pre-takeoff checklist
On the way home from KHYA
Early morning departure out of Provo (KPVU) for Boise yesterday.
Super cool!
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Kayoh@190
is there a story there?
Slumming it in the archer while my bird is in the shop. Stopped at Rochelle (RPJ) for lunch. Highly recommended.
There was a really pretty old cessna on the ramp. I'm generally not a fan of the high wing/ tricycle look, but between the paint and the fastback this one really caught my eye.
I think the Shorts lives there, I assume it's a contract box carrier. We also went to Rockford to look at a semi tractor. Always fun to see the 747's operating there. Should've taken a picture but I was busy getting lost. I still think he told me to turn right.
There was a really pretty old cessna on the ramp. I'm generally not a fan of the high wing/ tricycle look, but between the paint and the fastback this one really caught my eye.
I think the Shorts lives there, I assume it's a contract box carrier. We also went to Rockford to look at a semi tractor. Always fun to see the 747's operating there. Should've taken a picture but I was busy getting lost. I still think he told me to turn right.
They also have 6 skyvans at DeKalb but that isn't one of them.
One at Danville that I know is a UPS contractor. Danville was below mins. a couple weeks ago, so they landed at Champaign. About 45 min. later a UPS truck and a couple Ryder trucks showed up and they tossed the boxes into the trucks. And I mean TOSSED. Threw them from the back door of the plane as far as they could to the pavement. It explained a lot about why my UPS boxes look they way they do when they show up.
My UPS lady showed up late in the afternoon complaining they got her truck loaded late, so one of them probably was mine.
Skyrys62
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Meet the Fokkers
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Flying close to a buddy in his cardinal on a short run
Flying close to a buddy in his cardinal on a short run
Skyrys62
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Meet the Fokkers
I threw my fuel hawk at him but he dodged me (2nd picture)
Now I don't know how much fuel I have.
btw.. when we going up again?
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My Lance windows are terrible to take pictures through but this one was pretty good.
crash7
Line Up and Wait
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Crash7