ah, I forgot about Perpetual Motion drives. Thanks for reminding me.

Hardly perpetual motion.
The sails provide the horsepower to recharge for the most part.

no, "for the most part" nobody uses the technology/techniques suggested because
the **** don't work.

dragging buckets to gather water to pour on a watermill to turn the propeller
is still dragging buckets. It slows you down.

To the extent there is any gain at all, it is more costly, heavier, less
reliable than a gas or diesel fired engine.