OK, I know a
bit about axial fans.
I'm now wondering about "cage" blowers.
I
assume the vanes in the cages are wings. They certainly have an angle of attack and relative wind (wind direction being perpendicular to the opening of the cage).
So... in spite of it looking like a centrifugal water pump it's really a
fan (?) Is that right?
I'm trying to figure out if they'd be over-sensitive to restriction on the inlet side (the way centrifugal water pumps are). Anyone know? Yes, I realize they're called "blowers", not "suckers"

- but that's what I'm thinking about using them for.
I'm also wondering if the outer housing is actually necessary for the operation of the "suction side"? I don't believe it does, as long as the inlet area is shrouded away from the outlet area. Have I got this right?
I've ordered a couple of
these from AllElectronics. They don't have the "oomph" BB is looking for, but may actually be
fine for my use (low noise, pretty good cooling). And if they don't work for me, I'll have learned something - and have yet another interesting "desk gizmo"

Thanks!
Bob
PS: If all this info is on a web site (or in a book I can get) please just point me at it -thx!