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Originally posted by Invisus
Its a very difficult thing to comment on, i'm fully aware as i'm sure some people will state, that depending on the height and temperature of the air that the plane is flying at, factors on wether it leaves such long contrails.
But from experience i often see planes flying at seemingly similar levels, with one causing a massive contrail that often turns into clouds and yet the other just leaving a small one that slowly disapates behind it. (also to add i'm quite good at judging the type of aircraft so am quite sure its often the exact same plane having these opposing results.)
Sorry i can't add any more on the matter........its just one of those subjects you have to be quite conservative on these days for fear of being attacked.
Originally posted by Phage
The conditions at 30,000 feet and higher are extremely conducive to persistent contrails over Detroit. In fact, with temperatures of less than -60º, they are almost guaranteed.
DTX
Originally posted by Phage
reply to post by this_is_who_we_are
Well, I said minus 60º and I doubt it's that cold on the ground but at 32,000 feet it is, and colder.
Originally posted by Invisus
... But from experience i often see planes flying at seemingly similar levels, with one causing a massive contrail that often turns into clouds and yet the other just leaving a small one that slowly disapates behind it. (also to add i'm quite good at judging the type of aircraft so am quite sure its often the exact same plane having these opposing results.)...
The spreading out of jet contrails into extensive cirrus sheets is a familiar sight. Often, when persistent conditions exist from 25,000 to 40,000ft, several long contrails increase in number and gradually merge into an almost solid interlaced sheet.
300.0 9220 -51.3 -61.3 29 0.03 315 67 312.9 313.1 312.9
254.0 10281 -60.7 -68.7 34 0.01 324 68 314.3 314.3 314.3
250.7 10363 -61.2 -69.2 34 0.01 325 68 314.7 314.8 314.7
250.0 10380 -61.3 -69.3 34 0.01 325 68 314.8 314.9 314.8
234.0 10787 -63.9 -71.9 33 0.01 325 79 316.9 316.9 316.9
229.0 10919 -64.5 -72.5 33 0.01 325 83 318.0 318.0 318.0
227.0 10973 -64.7 -72.7 32 0.01 325 83 318.5 318.5 318.5
225.0 11027 -64.9 -72.9 32 0.01 325 82 318.9 319.0 318.9
214.0 11333 -63.7 -71.7 33 0.01 319 72 325.4 325.4 325.4
210.0 11449 -64.1 -72.1 33 0.01 316 69 326.5 326.6 326.5
208.0 11508 -62.7 -70.7 33 0.01 315 67 329.6 329.7 329.6
205.0 11597 -62.7 -70.7 33 0.01 313 64 331.0 331.0 331.0
202.0 11688 -60.9 -69.9 29 0.02 311 61 335.2 335.3 335.2
200.0 11750 -60.7 -69.7 30 0.02 310 59 336.5 336.6 336.5
195.0 11907 -60.9 -69.9 29 0.02 308 57 338.6 338.7 338.6
193.0 11972 -59.7 -68.7 30 0.02 307 57 341.5 341.6 341.5
187.0 12169 -59.9 -68.9 30 0.02 304 55 344.3 344.4 344.3
180.0 12408 -57.9 -67.9 27 0.02 301 52 351.3 351.4 351.3
175.0 12585 -58.9 -68.9 26 0.02 298 50 352.5 352.6 352.5
170.0 12768 -56.9 -67.9 24 0.02 295 48 358.8 358.9 358.8
Originally posted by Goethe
Those are chemtrails. Some will say contrails will stay for long periods of time... This is wrong. At most 10-20 minutes or so.
Ive been filming them steady for months now and when a plane goes by and leaves a thick foggy trail, and it turns into a massive hazy cloudy web covering the whole sky... ITS NOT A CONTRAIL
Contrails are normal and too be expected. They can last abit, but not long.
Sorry, but there is a major difference no matter what some say.
Go outside one day and devote the whole day to watching them and filming them. YOULL SEE THE DIFFERENCE VERY QUICKLY
Some will say contrails will stay for long periods of time... This is wrong.
A contrail, which I have imaged extensively, always leaves. Ive never seen one disperse and spread out to form a cloud like substance.
Images tell me everything I need to know for now.