Plane exhaust sampling

Mackdog

Senior Member.
I wanted to share this because I think it could be useful in debunking, and I didn't know what thread to put it under, but it is video of aircraft exhaust being sampled by a NASA Falcon 20-E5 aircraft. They are taking samples of particulate matter in the exhaust of a DC-8 and also the ice crystals of the contrail. There may be data out there on the samples, but I have not had time to check yet.

 

MikeC

Closed Account
A similar but much older study using a Sabreliner is quite well known - you can read the paper here.

One of the things they found is that a contrail can contain as much as 10,000 times as much water as the engine is generating - it is part of the "ice budget" argument you can search for on here - there's a lot about it :)

Essentially it amounts to the fact that no aircraft can carry enough of anything to make a contrail as long as those that are being seen - so whatever is in the contrails has to come from the atmosphere, hence is not being "sprayed".
 

Hama Neggs

Senior Member.
A similar but much older study using a Sabreliner is quite well known - you can read the paper here.

One of the things they found is that a contrail can contain as much as 10,000 times as much water as the engine is generating - it is part of the "ice budget" argument you can search for on here - there's a lot about it :)

Essentially it amounts to the fact that no aircraft can carry enough of anything to make a contrail as long as those that are being seen - so whatever is in the contrails has to come from the atmosphere, hence is not being "sprayed".

They have started devising "work-arounds" for the ice budget problem. One is that whatever chemical is being "sprayed" is causing some sort of chemical reaction(unspecified or explained further). Second is that the reason for the atmospheric moisture aggregating from the atmosphere is that released "nano-particles" are acting as condensation nuclei.
 

MikeC

Closed Account
The ACCESS II programme has it's web page here - they are actually looking at what makes contrails:

"The story so far":

 
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