He screwed the pooch on this one. He clearly only left the fan on for two seconds because he didn’t want to explain why his boat started moving when he left it on longer, whether that movement was spinning or moving forward. The sail isn’t a perfect wall that negates the forces of the fan and so some of the air will blow back or to the sides off of it and make the boat do something.

Mythbusters and The Action Lab both showed how this is possible.

There’s lots of other great info in the video, but he used this sail thing as click bait and is showing he cares more about selling his products now than really teaching. Sad.

TL;DR no

duh just ditch the sail and point the fan the other way

I tried blowing my own sail once, just ended up with a crick in my neck

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