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luxordelphi
reply to post by Aloysius the Gaul
If you're going to claim, as you have, that the dot-dot-dot contrails are due to variable humidity, you're going to have to do better than a couple of hundred stations world-wide.
luxordelphi
reply to post by mrthumpy
No need for insecurity. It is possible to embrace both of our viewpoints.
Please provide something that shows the flow rate at cruise. Please make sure it compares kerosene to kerosene.
Please provide something that shows water vapor in the upper troposphere/lower stratosphere not placed there by jets.
Please explain this nonsense:
IT'S ALREADY IN THE ATMOSPHERE the ice crystals in the trail from the engine just provide the nuclei for it to form ice on
mrthumpy
Please provide something that shows a RR Trent 900 producing 84000lbf thrust WITHOUT burning ANY kerosene
Aloysius the Gaul
mrthumpy
Please provide something that shows a RR Trent 900 producing 84000lbf thrust WITHOUT burning ANY kerosene
Or perhaps not........
luxordelphi
Please provide something that shows water vapor in the upper troposphere/lower stratosphere not placed there by jets.
Clouds?
Earlier methods for contrail avoidance included a simple rear mirror installed in the cockpit to allow pilots to observe whether a contrails forms behind the aircraft or not. If so, he would simply climb/descend to an altitude where no more contrail would form in the aircraft wake.
Further, according to a recent study (which I don't endorse or deny) suggests that heterogenous, not homogenous nucleation is preferred for cirri and further that mineral dusts (aluminosilicate) and heavy metals, not black carbon soots, are the preferred method and particle for cirri formation.
Formation of cirrus clouds depends upon the availability of ice nuclei to begin condensation of atmospheric water vapor. While it is known that only a small fraction of atmospheric aerosols are efficient ice nuclei, the critical ingredients that make those aerosols so effective has not been established. We have determined in situ the composition of the residual particles within cirrus crystals after the ice was sublimated. Our results demonstrate that mineral dust and metallic particles are the dominant source of residual particles, while sulfate/organic particles are underrepresented and elemental carbon and biological material are essentially absent. Further, composition analysis combined with relative humidity measurements suggest heterogeneous freezing was the dominant formation mechanism of these clouds.
Measurements were made in air traffic corridors although contrails were not specifically targeted.
I think you are missing my points. The outrageously persistent contrails that we all discuss in this forum are not forming during take-off and landing. They are forming at cruise (allegedly).
mrthumpy
Aloysius the Gaul
mrthumpy
Please provide something that shows a RR Trent 900 producing 84000lbf thrust WITHOUT burning ANY kerosene
Or perhaps not........
Definitely not, Page Not Found
luxordelphi
And the cutest thing of all, from this paper, abominably simple, is, wait for it...: a rear view mirror. lol
Earlier methods for contrail avoidance included a simple rear mirror installed in the cockpit to allow pilots to observe whether a contrails forms behind the aircraft or not. If so, he would simply climb/descend to an altitude where no more contrail would form in the aircraft wake.
How cute! How clever! No environmental impact statement needed. And today's technology (I had one in my old Southwind) can provide a little TV that shows what's happening out the back. Diabolical! All without chemicals!!
The topic was an interview with Dane Wittington. Originally, I listened to the first 10 minutes and discovered that today's jet engines are incapable of creating today's outrageously persistent contrails.
You have failed to show that black carbon soots are creating contrails.
Contrails or condensation trails are the upper ice crystal clouds produced by jet aircraft. They are visible line clouds generated by water vapor emissions that form behind an aircraft flying in sufficiently cold air. These ice clouds have been known to form through the freezing processes involving water droplets that are formed a priori on the soot (black carbon or BC) and sulfuric acid particles emitted from aircraft and/or background aerosol particles.
Why do you constantly ignore atmospheric chemistry and physics?
Why would you continue to believe a propaganda machine that puts out information,
luxordelphi
reply to post by DenyObfuscation
You are unable to put up anything that shows that a cooler engine creates more contrails.
You have failed to show that black carbon soots are creating contrails.
You have failed to show that today's engines are releasing more water vapor at cruise.
All you have said is that today's engines are less efficient and more polluting than yesterday's.
Why do you constantly ignore atmospheric chemistry and physics?
The psychopaths behind the trashing of our skies are not ignoring these. They are using them to their advantage.
Why would you continue to believe a propaganda machine that puts out information,....
.... which, extrapolated, shows zero (0) fuel consumption at cruise? Doesn't that tell you anything?
luxordelphi
reply to post by DenyObfuscation
You all have countered with cooler engines, thrust and the total nonsense that these engines are spewing ice.
luxordelphi
All you have said is that today's engines are less efficient and more polluting than yesterday's.
Depending on the airline, the average service life of an aircraft is about 20 years. Jet aircraft burn enormous quantities of carbon-producing fossil fuel (although modern high-bypass jet engines burn significantly less fuel than earlier turbojet models)
Not that I expect any display of good character from you, but could you point out where anyone said this?