United Airlines flight 935, a 777 dumped fuel over the UK today before returning to Heathrow.
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They seem very elusive. It would be good to see how quickly the trails dissipate.Is there a photo or video that shows the full extent of the trail made by this fuel dump?
In this video you can see two planes dumping fuel. At 0:16 the camera zooms out, and it appears the trails are rather long.And the length. Is there any fuel dump picture that doesn't crop the end of the fuel trail?
Is the fuel crystallising momentarily?
https://www.metabunk.org/debunked-why-in-the-world-are-they-spraying-wingtip-fuel-dump-photo.t645/And the length. Is there any fuel dump picture that doesn't crop the end of the fuel trail?
Exonn/Mobil avgas 100 says the freezing point is -58* C
When the commercial jet industry was developing in the 1950s, kerosene-type
fuel was chosen as having the best combinations of properties. Wide-cut jet
fuel (Jet B) still is used in some parts of Canada and Alaska because it is
suited to cold climates. But kerosene-type fuels – Jet A and Jet A-1 – predominate
in the rest of the world.
Jet A is used in the United States while most of the rest of the world uses
Jet A-1. The important difference between the two fuels is that Jet A-1 has a
lower maximum freezing point than Jet A (Jet A: – 40°C, Jet A-1: – 47°C).
The lower freezing point makes Jet A-1 more suitable for long international
flights, especially on polar routes during the winter.
(I realise this is a quote from an external source.)especially on polar routes during the winter.
(I realise this is a quote from an external source.)
I don't think the temperature at cruise altitude in polar regions is all that cold, given the relatively low height of the tropopause (above which the temperature ceases decreasing with height, or even increases).
The Lufthansa flight LH404, a Boeing 747-800, was flying from Frankfurt to New York but diverted to Manchester airport at around 7pm.
People from Barrow witnessed the plane flying low, with its wheels down and apparently dumping fuel over Morecambe Bay.
A Manchester Airport spokesperson said: An aircraft from Frankfurt to New York JFK made a divert into Manchester Airport and landed safely with approximately 360 people on board.
so the plane warms the contrail area up 25 degrees? maybe a better question is... whats an "airframe temperature"?Just moving through the air at the speeds we do increases the airframe temperature by 20-25 degrees