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In this video I make an anti-cavitation plate for a boat swamp vehicle. I welded it, painted it and brought it to the river on a karakat. We installed an engine on a homemade flat-bottomed boat made of plastic (HDPE). We drove a little and realized that the plate did not give anything and there was still no movement, if only at idle speed it goes well. We will figure it out further and experiment. I bought the motor oar here https://vk.com/lifan_43