I'm going to post this here, and then I'm going to start a thread on it. The long, white lines in the sky are impossible to "spray."
occur between 16,000 to 39,000 feet. Precisely where commercial aircraft
also fly. They occur at frontal boundaries, and they rarely cast shadows, but they often precede rain, because the moisture level at those altitudes
has to be sufficient to support the cloud formation.
look similarly but are typically more water and less ice. These occur at lower
altitudes, up to about 20,000 feet, so they are often seen together with Cirrocumulus, and they also often precede rain. These clouds can cover
thousands of square miles.
Now, let's consider the density of a very small, but average cloud.
Consider a hypothetical but typical small cloud at an altitude of 10,000 feet, comprising one cubic kilometer and having a liquid water content of
1.0 gram per cubic meter. The total mass of the cloud particles is about 1 million kilograms, which is roughly equivalent to the weight of 500
But, to be more specific, lets look at the specific size of a typical white line in the sky.... a contrail.
Size of Contrails
, if we know the size of an airplane, then we can estimate
the size of the contrail, and the length of the contrail, and with a known density to clouds, we can determine exactly how much liquid would need to
be there to form the contrail. So, lets work backwards from known airplanes.
Lets say we are talking about the planes in the link above. A KC-135 or 747-400, similar in size, wingspan of 131 feet. Lets say we see one of those
planes flying over at 32,000 feet, and the contrail spreads out behind it at about double that width, so lets say 260 feet wide, and it is save to
assume a cross-section of the contrail is tubular, so pi times radius squared times the length would give us the volume, and the volume times the
density would give us the mass of that cloud.
SO, the KC-135 Stratotanker
has a maximum weight of 322,500 lbs, with a useful
payload of 200,000 lbs. So, 200,000 lbs of some liquid, lets just use water. Water has a weight of a little over 8lbs per gallon. So, 25,000
gallons of water.
Now, an average cloud has a density of about 0.5g per cubic meter, so to convert that to US measurements, that is 0.0011 lbs per cubic foot.
If we know we can carry 200,000 lbs of water, then we know the Stratotanker could create a cloud that is about 6 billion cubic feet in volume. So, pi
is 3.14 times radius squared is 131*131 is 17161 equals 53885 square feet cross section, which means the contrail for the maximum load of the
Stratotanker could stretch 260 feet wide by 118,771 feet long, which is about 22 miles.
If a plane is flying at 30,000 feet or above, you can see it for over
200 miles horizon to horizon.
So, if you see a single plane, spraying a Contrail from horizon to horizon, it would have to have the capacity of at least
11 times that of a 747-400 or KC-135 Stratotanker. There is no such plane, so there is no such thing as "spraying" a contrail.
Now, that is the simple version, but in reality, we know the contrails are wider than 260 feet, we would also have to talk about the humidity and
ambient conditions, and nozzling and delivery system that could actually create minute particles that would stay aloft, and then for the hardcore
chemtrailers that believe heavy metals such as aluminum are added, we would have to account for all that extra density, and in reality, it would
probably take a freight train of 20 or more super-cargo jets just to haul the materials up to the altitude to create a single trail!
They are, and always have been CONTRAILS! Caused by the quick compression and decompression of already humid air, where conditions are right, or at
least intermittently right for them to form ice crystals and stay aloft and reflect light and become visible to us 7 miles below on the ground.
I'm going to put this into another thread, with a little more detail and pictures, but there you have it, physically impossible by any known aircraft
that we have!
edit on 12-7-2012 by getreadyalready because: (no reason given)