"Wayne.B" wrote

20 hp is capable of generating 300 to 600 pounds of reverse thrust thanks
to the big
props, enough to stretch a 3/8 chain bar taught or nearly so.

Yes, but 20 hp doesn't do much with a skinny little two blade sailboat
wheel. When backing down against the anchor the propwalk puts most of the
horsepower into just swinging the stern around sidesways with very little
strain on the anchor rode. I probably get more dig in just by janking on
it.

Sailboats are different.

--
Roger Long