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The story so far
Measurements taken during ACCESS I in 2013 of the burned blended fuel showed soot emissions were reduced by 40 to 60 percent compared to JP-8 fuel by itself, according to Bruce Anderson, NASA's principal investigator for the ACCESS program.
"We saw big changes in soot emissions from the DC-8, but we weren't able to make clear ties between the type of fuel burned and formation of contrails. So for ACCESS II we really want to dig into that," Anderson said.
Understanding more about contrail formation is important because they are considered an essential variable in discussions about climate change.
While it is known that contrails are ice particles that form when water vapor from jet exhaust condenses and freezes on some source of nuclei, there are a number of different models to suggest what the source of the nuclei might be, Anderson said.
The source could be soot from the jet engine exhaust, so the use of alternate fuels might reduce contrail formation. The source could be from the sulfur that is present in jet fuels, so a low-sulfur or non-sulfur fuel might make a difference. And still other models suggest that just the presence of normal background aerosols in the atmosphere is enough to trigger contrails.
"It could be any or all of those things. Some people say there’s so much water vapor in the exhaust of an aircraft that any particles at all will seed the formation of ice," Anderson said.
To help test at least one of those possibilities, for ACCESS II the DC-8 will fly with both a low sulfur and high sulfur grade of JP-8 jet fuel.
originally posted by: Aloysius the Gaul
a reply to: OccamsRazor04
Well yeah.....I was just trying to show het lengths they go to to support their lies, as opposed to eth lengths the "truth seekers" go to to support theirs.....