Re: [electricboats] Anyone with ME1616 experience? planning to run one at 48VDC, what is the actual kW available? 6kW continuous?

"That's the first I've heard of props being most efficient around 1000RPM."

 

It's not that there's some peak efficiency at that RPM.  It's just that lower is better for RPM when it comes to prop efficiency ("all other things equal").  Mostly due to drag going up more than linearly with speed (speed of prop blades through the water).  There are of course practical limits to how low of an RPM can still be effective (pitch gets too high to be workable).

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