Comments on: Why Planes Make Vapor Trails http://contrailscience.com/why-planes-make-vapor-trails/ The Science and Pseudoscience of Contrails and Chemtrails Sat, 04 Feb 2012 15:04:06 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: JFDeehttp://contrailscience.com/why-planes-make-vapor-trails/comment-page-3/#comment-108396 JFDee Mon, 02 Jan 2012 06:02:26 +0000 http://contrailscience.com/?p=489#comment-108396 Harvey, the temperature in the altitude where commercial jet traffic usually occurs is <b>very</b> different from the temperature on the ground. Look for stories about stowaways in planes who discovered this the hard way even when they took off in a hot climate. If you prefer science, read this: http://en.wikipedia.org/wiki/Lapse_rate Harvey,

the temperature in the altitude where commercial jet traffic usually occurs is very different from the temperature on the ground. Look for stories about stowaways in planes who discovered this the hard way even when they took off in a hot climate.

If you prefer science, read this:
http://en.wikipedia.org/wiki/Lapse_rate

]]> By: Uncinushttp://contrailscience.com/why-planes-make-vapor-trails/comment-page-3/#comment-108393 Uncinus Mon, 02 Jan 2012 05:55:44 +0000 http://contrailscience.com/?p=489#comment-108393 about -40 or below. It's always that cold at some altitude. But you also need humidity. about -40 or below. It’s always that cold at some altitude. But you also need humidity.

]]> By: Harvey Gallophttp://contrailscience.com/why-planes-make-vapor-trails/comment-page-3/#comment-108369 Harvey Gallop Mon, 02 Jan 2012 03:38:21 +0000 http://contrailscience.com/?p=489#comment-108369 This site really lacks any scientific detail. How cold does it have to be in the upper atmosphere to create contrails that persist and spread out across the sky. I notice it occurs even on days that are nearly reaching 40 degrees. This site really lacks any scientific detail. How cold does it have to be in the upper atmosphere to create contrails that persist and spread out across the sky. I notice it occurs even on days that are nearly reaching 40 degrees.

]]> By: TJhttp://contrailscience.com/why-planes-make-vapor-trails/comment-page-3/#comment-64948 TJ Sat, 09 Jul 2011 08:02:12 +0000 http://contrailscience.com/?p=489#comment-64948 imakeOPSname2?: Those two objects under the wings of the red airplane you posted are its fixed landing gears. imakeOPSname2?: Those two objects under the wings of the red airplane you posted are its fixed landing gears.

]]> By: TJhttp://contrailscience.com/why-planes-make-vapor-trails/comment-page-3/#comment-64947 TJ Sat, 09 Jul 2011 08:00:43 +0000 http://contrailscience.com/?p=489#comment-64947 imakeOPSname2?: That picture of the red airplane you say is emitting a "persistent contrail" is actually an airplane used for aerobatic maneuvers. It uses a smoke machine to emit smoke so that crowds can more easily track it as they are watching the pilot perform. imakeOPSname2?: That picture of the red airplane you say is emitting a “persistent contrail” is actually an airplane used for aerobatic maneuvers. It uses a smoke machine to emit smoke so that crowds can more easily track it as they are watching the pilot perform.

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