Is that a joke Big Gimper? What's a Chemtrail?? All I can see are vapour trails coming from the 747, am I missing something?
It's a joke. Along with the Flat Earthers, faked moon landers etc there is another group who believe that jet engine vapour/contrails are "deep state" chemicals being released into the atmosphere to manipulate weather and humans. Also makes modelers like/want to build in 1/72 scale.
From Wikipedia:
The chemtrail conspiracy theory is based on the erroneous belief that long-lasting condensation trails are "chemtrails" consisting of chemical or biological agents left in the sky by high-flying aircraft, sprayed for nefarious purposes undisclosed to the general public.
Believers in this conspiracy theory say that while normal contrails dissipate relatively quickly, contrails that linger must contain additional substances.
Those who subscribe to the theory speculate that the purpose of the chemical release may be solar radiation management, weather modification, psychological manipulation, human population control, or biological or chemical warfare and that the trails are causing respiratory illnesses and other health problems.
https://en.wikipedia.org/wiki/Chemtrail_conspiracy_theoryIt is build into the ACARS systems:
The folks at Sierra Hotel Aeronautics have a fine selection of Chemtrail products to annoy the believers:
https://sierrahotel.net/collections/chemtrail-dept