wush

[Glenn]

Yeah, I know...its either a 747, a 380, a Glowplug 3 or something Russian......you tell me?
Glenn

http://i238.photobucket.com/albums/ff166/strathojet/real%20aircraft/fujixpcontrail_zps6e1cf8e3.jpg

[The Rat]

It's those damned chemtrails, they're genetically modifying bunnies so that they can beam mind control rays into our brains! 

[Glenn]

'A Glowplug' was the name given to Globemasters by their crews. So, Globemaster 111

[PR19_Kit]

It's a 747-400.

The '4 into 2' contrails that a -400 makes are unique AFAIK, even an A340 doesn't do that.

Having said that I've not seen a 747-8 contrailing yet, at least not one that I can identify properly, but they don't have the big winglets like the -400s.

[Captain Canada]

Isn't it a trait of all the 747 family ?

[PR19_Kit]

Sometimes, -400s do the '4 into 2' but much more than the earlier versions, and the '2' bit is much more defined because of the vortices generated by the winglets.