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Testing If You Can Blow Your Own Sail [17:06]
(www.youtube.com)
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this post was submitted on 04 Mar 2024
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That's what I was thinking.
The fan in the thumbnail (and the one he tries in the video) fails because the fan's intake is pulling the fan away from the sail (like an airplane propeller). However, I wonder if you redirected that intake to the front of the boat while directing the output to the sail, could you get more thrust? The fan's intake and output would then be working together.
Also the leaf blower could work in theory but I think there's too much friction for the leaf blower to overcome. If it did have enough to push you, then you'd also be pushed sideways by the blower's output as well