Quote:
Originally posted by Skulemate
Ben, the pressure shouldn't be dependent on the cross sectional area. If you used a larger tube it would take longer for the pressure to stabilize, but it wouldn't change the maximum value that the pump would produce.
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Of course it wouldn't. I just observed Nico state that he gets a 30mm head, but didn't specify the diameter of the tube he used, to measure that 30mm.
30 mm is well over 1 inch, and as a fan it shouldn't be able to come close to that. Given that the fan was replaced with a paddlewheel, it should perform even worse.
I was merely pointing out that where fans are spec'd to say, less than 1/4" H2O, it is a measure that is based on a specific diameter, which I believe is 1 in. ^2.
Heck, with a tube small enough, I could state that my fan has a head of 1 meter!