Black smoke ring in Kosovo sky October 2010., page 1
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reply posted on 4-10-2010 @ 12:27 PM by butcherguy
reply to post by CASH69
I saw fairly large smoke ring when I was a teenager. It was not quite that large, but looks a lot like it.

It involved a pound of FFg black powder in the manufacturers one pound can and a 55 gallon drum with one end cut out.

After the ring rose up into the air a ways, it looked dark like that one in the video.


reply posted on 4-10-2010 @ 12:41 PM by Arbitrageur
Originally posted by CASH69
Just thought this seemed kind of strange. Guess i'll let you guys hash it out,lol.

This is weird! www.youtube.com...
Caelestia has some good information about these and a decent collection of images:

Ring-shaped Vortices

They undoubtedly rank amongst the most eccentric sky phenomena on the planet: the metres-wide rings of vapour or smoke that can be seen floating through the air on occasion.

The physics behind these "vortex rings" is very complex. Moreover, vortex rings do not always form in the same way. In most instances, the rings are formed by air mixed with smoke or steam that is forced out of a (relatively) small circular or cylindrical opening (this can be a chimney, the barrel of a canon, or a vent in a volcano crater). Because of the drag of the surface of the opening, the air expelled from the centre will move faster than the air exiting the opening near the edge. The air from the sides is sucked in, and a circular motion is created. In this way, a doughnut-shaped vortex is formed, just like a smoke ring that is blown from a smoker's lips. The ring-shape is maintained due to the rotational motion of the air flowing in the vortex ring.

The number one cause of the latter type of vortices is explosions. These can be either accidental (for instance by a short circuit or a lightning impact) or induced (for instance during bombings, mining activities and the clearance of mines).
Were there any explosions? That's the most common cause but certainly not the only cause.

One has been seen form over an amusement park with some kind of "volcano" attraction and a large sudden combustion formed the ring, more or less an explosion I guess though not exactly.



reply posted on 4-10-2010 @ 04:34 PM by SassyCat
reply to post by Arbitrageur

It being a "volatile" area it wouldn't surprise me it was some kind of explosion or experiment with improvised explosives.
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