Made specifically for a static pressure test. Not sure if it would actually be useful in any real life situation, but intersting aerodynamics anyway, giving 6.5mmH2O. Maybe a bouncy castle for your hamster.

Video below, kinda gimmicky but fun anyway - it lifts about 1 ¾ Lbs (0.8kg)

Swept back blades seem to move air out to the perimiter and the bottom plate blocks air from returning.

Any filament, 2-3 perimeters, 0.16-0.2mm layers works well.

This fan→ https://makerworld.com/en/models/13193#profileId-13825 is a much better all-round performer, if you're looking for something that outperforms the stock fairly well across the full backpressure spectrum.