Common Courtesy!

[Clipper]

GnatMan Pre 1990 I haven't got a clue. The Angel in the first pick is probably post 1990. Thay are all on Simv, but that's really stretching it.. THE ANSWER IS WAY SIMPLER, AND CAN EASILY BE SEEN IN THE SCREENSHOTS! KEEP LOOKING!

[A/SGT.Mav316]

They have their landing gears down?

[Mobius]

All N-numbers have a 4 in them, and they all start with N.

[francsal]

hmmm... there

[xFLAMESx]

All N-numbers have a 4 in them, and they all start with N.

Good call, all have the number four on them somewhere.

[Kansas33]

does it have something to do with the weather bc its eitehr sunset or snowing or raining

[Clipper]

Mobius...You're the man to-night! They all have the number 4. Again thanks to all who participated, I hope you had fun

[Mobius]

Wow ,  I thought I would be closer with my guess about all the N-numbers starting with N .  Thanks Clipper, I spent quite a while staring at all those great shots.

[Clipper]

Mobius, there's no N in shot 5 or 7, remember the "common" had to be in all 7 shots!

[Mr.Mugel]

And they all have just one vertical tail rudder.
It seems like they all have running engines.
And they all have a cockpit, and they should all have at least one pilot...

[Hai Perso Coyone?]

Uh...The engines are on in all of them
Not exactly aircraft but, there is bad weather in nearly all of them

[Clipper]

You guys don't miss a thing! Keep going until absolutely every mathematical possibility has been dissected...Has anyone counted the number of pixels yet American Idiot, must be all engines and all have bad weather..sorry

[igorski]

are they all made by companies now part of Boeing? except the 747 always was a Boeing jet

edit : ignore that I didnt see the 2nd page...

[beefhole]

Theyre all freeware?
Theyre all on earth?

[Clipper]

Beefhole, finally someone realized they're all from the planet earth. If we carry that a little farther, they're all in the Milky Way.