For a low power (e.g. human-powered) boat, are there any potential advantages of running two separate propellers instead of one from the pedals?...
I'm envisaging an sea-/ocean-crossing pedal-powered boat. Pretty much all of the solo versions of these boats to date have been monohulls, and...
I've seen a few designs for boats that are finned or sculled from the rear, but none seem to resemble how many fish power themselves. Fish seem*...