Typhoon1244 #2
Concerning Chem Tail at
www.geocities.com/houstonchemtrails
You said:
1. "this is a picture of a Continental 767 airliner"
then you said
2. "I'm assuming it's a Continental 7-6 based on the location and what we can see of the paint job."
3. "with a contrail forming about fifty feet aft of each engine."
I would be hard pressed to say from looking at the bottom of that jet, in the photo Chem Tail that the jet is a Continental 767 airliner. it appears gray. Gray is gray. The color is to obscure to identify an airliner with it. I've seen military jets on Wings and at air shows and on movies that appear gray but I can't say for certain the nature of this plane. I'd have to leave the identification part a mystery. It could be military or it could be civilian.
Also, you use the word "assume". Your guessing. You more evidence besides guessing!.
What is factual is this.
Austin is arid, dry, and hot with typically clear skys and the locals will tell you point blank that jet contrails are not a part of the scenery.
Its so hot and dry in Austin that by the beginning of May the grass has browned out or is dead, the creek beds are dry and the animals are thirsty. Its a perfect place to ask some scientific questions.
Since it was 100 degrees out that particular day when I took the photo lets do some math using Fahrenheit and the 3.5 temperature decrease per thousand that you gave to me.
3.5 times 40,000ft = 140
100 degrees - 140 = -40F (which is when converted to Celsius -40 as well)
Therefore that jet would have to be 40,000ft to form jet contrails.
(remember that NASA and NOAA us the -40 figure for jet contrail formation)
Also, according to NASA and NOAA you need high humidity to the point of saturation (they usually use a figure of 70% or more)
However, in this arid climate on a normal hot day its between 5 and 10 percent humidity.
So my question is: Is it a normal jet contrail or a chemical trail?
I don’t think were seeing a jet contrail because:
1. Its too low. A 20X optical zoom would never photograph a jet that close at 40K feet.
2. Humidity is too low.
3. Temperature is too hot if the jet is at a low altitude.
There is one other thing about this situation. If it was a normal jet contrail, under Austin conditions , (high temp and low humidity), then the trail would not persist very long. If in Houston, a study shows that the average duration of a jet contrail is 30 seconds under high ground heat and high humidity, you wouldn’t even notice it under the Austin conditions of high ground heat and extremely low humidity. You would barely notice any trail on film as you filmed it.
Therefore, you have every right to call that jet trail in that photo into question.
What you should see is what I saw last week in Austin, a jet high in the sky reflecting off the sun with no visible trail coming out the back.
Could it be ahh.. ahhh.. (your going to hate me, abuse me and scoff at me) a CHEMTRAIL? I know what your going to say before you type it.
1. There’s no such thing as "chemtrails"
(even thought the government admits the program exists.)
2. That is just a commercial jet airliner because nobody would ever question my judgment as a pilot.
3. Denver130's last name is Gump.
4. Denver130 twists the truth.
5. Denver130 is developing a religion
6. I've seen low altitude jet contrails in the desert. Who needs high altitudes, high humidity and extremely cold temperatures? Thats only for mathematicians. We pilots think differently.
7. We would never question anything unusual anyway unless my wife cooks me grass.
If chemical engineers at ConocoPhillips with no background in the chemtrail issue can call what they see a chemical spill in the air, it might not be a bad idea to step off of your plane, open up your mind and look up at the sky.
I'm telling you the truth... people are being spoofed by the appearance of something that does not appear "normal" to them. A pilot pat answer is not a good enough explanation. A pilots assumptions are not good enough answers.
Observe it, study it, compare it with known science, then you'll come up with a different picture.