Welcome to the UKWA Home Page Forums Cruising Boat Speed with outboard Reply To: Boat Speed with outboard

Bob Harland

I cannot say much about outboards, but here is the theory on hull speed:

the speed v for a displacement hull is
v x approx 1.34 x square root of{LWL}
where v is in knots and LWL is in feet

that’s a bit over 5 knots for a Wayfarer
So to exceed that speed the boat needs to plane. Which I guess needs a lot more power.

More info here;

hope that helps.