Recent content by dazednotconfused

Many thanks for the detailed reply. Ordered it from Amazon and will test as soon as it arrives. Thanks.

It's an experiment that might turn into a standalone product that wouldn't use a PC. Not easy finding a fan with comparable CFM, static pressure, size, and decibel specs. Others tend be either too large or too loud.

Thanks for the reply. Earlier, both a 3-wire and a 4-wire Delta fan I tested worked with only red & black connected so I presumed the BFB0712HHD77 would too: https://www.delta-fan.com/Download/Spec/BFB1012EH-C18J.pdf https://www.delta-fan.com/Download/Spec/BCB0812GHN-F00.pdf If the...

I ordered this 3-wire 12V centrifugal fan: https://www.delta-fan.com/Download/Spec/BFB0712HHD77.pdf Connected red/black to 12 volt battery and it didn't turn on. Anyone have experience with Delta Fan's BFB0712HHD77? The 3rd wire is for PWM, but my understanding is that a PWM fan should...

That's extremely helpful. Yes, in the axial fans we are testing there is a gap between the blades and the fan tube which presumably is how the air was flowing backwards through. Will switch to a blower fan per your suggestion. Thanks!

Thanks for the reply. I tried that now. It made a slight improvement, but still hardly any air coming through the filter end and on the fan exhaust end lots of turbulence (air going in and out). Maybe a 17 CFM fan is still under powered?

I'm hoping someone here can help me with this fan and air flow question even though it's not about computer cooling. I'm trying to pull filtered air through a small chamber as part of a lab experiment and getting unexpected behavior. The chamber is a tube, 12" long and 4" inside diameter. On...

This isn't a computer cooling question, but hopefully someone here with airflow knowledge can answer it. I'm trying to pull filtered air through a small chamber as part of a lab experiment and getting unexpected results. The chamber is a 12" long tube with 4" inside diameter. On one end is a...