Can I play the big fan game too? 
Have you tried the same experiment with just one of the fans? AFAIK the fact that there are 12 shouldnt be that much of an improvement due to teh first fan being the only fan that intakes air - how about thrying it with them paralell instead of in series - []http://i.imgur.com/trZWTJul.jpg[/]
- []http://i.imgur.com/pcyPEj6l.jpg[/]
- []http://i.imgur.com/MyA74jcl.jpg[/]
- []http://i.imgur.com/IlFVpr1l.jpg[/
- []http://i.imgur.com/5IoBlTFl.jpg[]
- []http://i.imgur.com/c42Jb8ul.jpg[]
- []http://i.imgur.com/Ko6RY4hl.jpg[]
- [URL=http://i.imgur.com/LQ8rwzG.jpg][]http://i.imgur.com/LQ8rwzGl.jpg[][/URL]
I made a bag thing out of a painters dropsheet to show how much air it moves.
http://www.youtube.com/watch?v=ihvaFVsB4G8
![[]http://i.imgur.com/trZWTJul.jpg[/]](http://i.imgur.com/trZWTJu.jpg){kind=link}
![[]http://i.imgur.com/pcyPEj6l.jpg[/]](http://i.imgur.com/pcyPEj6.jpg){kind=link}
![[]http://i.imgur.com/MyA74jcl.jpg[/]](http://i.imgur.com/MyA74jc.jpg){kind=link}
![[]http://i.imgur.com/IlFVpr1l.jpg[/](http://i.imgur.com/IlFVpr1.jpg){kind=link}
![[]http://i.imgur.com/5IoBlTFl.jpg[]](http://i.imgur.com/5IoBlTF.jpg){kind=link}
![[]http://i.imgur.com/c42Jb8ul.jpg[]](http://i.imgur.com/c42Jb8u.jpg){kind=link}
![[]http://i.imgur.com/Ko6RY4hl.jpg[][URL=http://i.imgur.com/LQ8rwzG.jpg][]http://i.imgur.com/LQ8rwzGl.jpg[][/URL]It needs to run off a car battery jump-starter (600 A peak current) because none of my bench PSU could handle it. It needs about 200 watts or more. Even my small desktop PC ATX PSUs were no match.I made a bag thing out of a painters dropsheet to show how much air it moves.http://www.youtube.com/watch?v=ihvaFVsB4G8](http://i.imgur.com/Ko6RY4h.jpg){kind=link}
I have 15 of these delta 120s - 252CFM - lovely for shifting air BUT too loud for continuos use (unless its in a server room) i have 12 pulling air in my server cab and 3 to 'play' with