Nomad Willy
Guru
Fish wrote;
“Up here in Maine there's tons of SD hulled lobsterboats that do quite well in the planning department, I have one friend with a 42' lobster boat that does over 40kts and race boats do up to 70kts with an SD hull.”
Those are actually planing hulls. The soft/rounded chine causes more drag but those boats have enough power to overcome it. If they had hard chines the’yd be faster but the’re planing hulls. Reason being the majority ofthe bottom is flat and there’s a clean break at the transom/bottom edge. Given a little speed the water breaks free at the end of the transom. And as you go faster the water comming up around the chine curve has lesstime to rise up so the soft chine restricts speed even less.
“Up here in Maine there's tons of SD hulled lobsterboats that do quite well in the planning department, I have one friend with a 42' lobster boat that does over 40kts and race boats do up to 70kts with an SD hull.”
Those are actually planing hulls. The soft/rounded chine causes more drag but those boats have enough power to overcome it. If they had hard chines the’yd be faster but the’re planing hulls. Reason being the majority ofthe bottom is flat and there’s a clean break at the transom/bottom edge. Given a little speed the water breaks free at the end of the transom. And as you go faster the water comming up around the chine curve has lesstime to rise up so the soft chine restricts speed even less.