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Author
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Topic: 'Quadra Spray' | Topic page views:
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Thermit
Tech
Houston, TX
2733 posts, Jul 2000
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posted 11-30-2000 02:27 PM
   
quote:
From: CTTUSA (Message 43412 of 43433)
Re: Quadraspray photos postedhappytun (43/M/Houston, TX) 11/30/00 6:49 am
No this was not an air show. They hammered us all day that day and I suppose to end the spray show they did this. One could argue these were normal contrails especially from small fighter planes. My problem is I see this sort of "spraying" on a regular basis from small planes this size that turn their sprays on and off. I also feel like they were way too low to make normal contrails. ... ALL surrounding clouds are chem clouds. While those shots were being taken you could do a 360 and see 6 other large planes spraying. While I stood in the street taking these pics a kid rode up on his bike and said he was scared these four rockets were going to crash on him and rode off. Point being they were not normal in his eyes either. bill
Any guesses as to altitude?
[Edited 2 times, lastly by Thermit on 11-30-2000]
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nodebbunker
Senior Member
Indiana USA
200 posts, Nov 2000
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posted 11-30-2000 02:42 PM
My guess - w a a a y up there. You can hardly see the planes and if it weren't for the contrails, the photographer probably wouldn't have noticed them. Looks like dissipating trails to me. "to end the spray show, they did this." Geeez. ------------------
just a housewife from Indiana
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Thermit
Tech
Houston, TX
2733 posts, Jul 2000
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posted 11-30-2000 02:57 PM
Well, it is true that this day had an abundance of persistent trails. Noted some that lasted for hours and hours. And what struck me as unusual was when I saw a plane leaving a trail with about 90 seconds of persistence that flew right through one of the trails that was hanging around for hours. I could tell that they were at the same altitude because the part of the short trail that went though the persistent trail got stuck there. I'm wondering why one trail at a given altitude would last for several hours while another trail at that same altitude would only last 90 seconds? Different engine types shouldn't make that big of a difference.This is the vapor chart: 
Here's a link to the sounding:
http://www.chemtrailcentral.com/cgi-bin/db-search.cgi?template=img-detail&dbname=img&key2=530&action=searchdbdisplay P.....T.....TD.....diff....alt
350 -33 -43 (10) (27171 ft)
300 -41 -52 (11) (31102 ft)
250 -52 -62 (10) (35104 ft)
200 -62 -68 (6) (39796 ft)
150 -66 -69 (3) (45636 ft)
135 -66 -69 (3) (48556 ft)
115 -68 -72 (4) (49868 ft)
100 -69 -74 (5) (53543 ft)
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nodebbunker
Senior Member
Indiana USA
200 posts, Nov 2000
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posted 11-30-2000 03:26 PM
I've seen that here during the summer months but not so much this year as last. That's a Canex question, but looking at the vapor chart you provide, the Goes8 satellite for that day and the fact Monday was another heavy aviation travel day, I would say that front whirling and swirling to the south there would have something to do with it. Those sounding charts are too complicated for me and that's why I use the ADDS charts
for winds, RH and temp. Conditions change constantly.
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