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I feel like I've seen some of these before without the variable pitch part

ex. https://www.youtube.com/watch?v=jlMDabBfJp0



You can waterproof regular fpv quads with silicone coating on the pcb. https://www.youtube.com/watch?v=WzUy6Wk86-A

Right I remember this spray stuff like rusteoleum or something. I always flinch when I see a motor run underwater ha.



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