Air flow: It's all about fan thrust

It would be interesting to plot the air moved and noise generated to get a "noise efficiency" rating for the fans.

I’m a big fan of your experiments, the results blew me away.

This channel is the closest I've found to high school physics class - which I still remember loving 55 years ago... Thank you Matthias for making an old fart's morning better.

It would be interesting to see thrust efficiency (thrust vs power consumption)

My husband told me about your video and we did a minor test on our box fan that we kept right against the screen door. When we moved it away(about 4 feet), it produced significantly more breeze. Thank you so much for this!!!

Excellent video as per usual, but I'm somewhat surprised you didn't test one of your home made blowers in the test rig as well. Would be rather interesting to see where your trash picked plywood and yard-sale motor creations compare to one another, let alone the store bought competition. Thanks again for sharing.

I picked up a dreo based on your last video and over the 4th I run a fireworks show and used it to push air into the back of a big box truck to cool it down while we were unloading it. I also had an old school circular fan (slightly larger than the dreo) I asked how well they worked, and the report I got was that the old fan moved a lot of air a short distance, the dreo moved a little air a long distance, but when run together they resulted in a lot of air moving a long distance, so you may want to try combining the box fan and the dreo (next to each other, on top of each other) and see if you see a similar multiplication effect.

I picked up one of those Dreo fans, they are very impressive. One of my favorite (albeit mundane) features is that the LED display will automatically turn off depending on ambient lighting conditions, i.e. when sleeping

I would have liked to see the watts power input to each fan on your graphs. Also as you move the fan backwards in the room you are creating all kinds of air patterns that can effect your sensor . For example if air is going out the back door it will make different readings on that . A smoke test would be interesting see what the air is really doing. Also a blower door test where the entire door is blocked so you see how much positive or negative pressure is created.

I would love to see you test some of those air movers they use to dry carpets and such. The have similar cfm, but seen to produce lots more thrust.

Love these type of videos. Very informative. Thank you and keep up the good work.

The consistent results of all of your tests are that the cheap fans do best...crazy.

Thank you, I really appreciate this analysis. Fantastic job as always!

What a great video. I loved the cart at the end. Cheers

great video... love how you answer all our questions on air flow

That's why i love your videos. Nice experiments

I just love this channel, i really do.

The videos on this channel over the past several months are my favourite content on youtube right now. Thanks Matthias.

Youtube has shown me a nice channel today! Keep up the good stuff! This knowledge is gonna save people!

Your video was as informative as usual thank you for making it