high aspect keels - construction

[samh]

How are high aspect fin keels typically attached to the boat? Is there some sort of trunk that they slot into? (non canting)

sh

[Paul B]

They can have a trunk, like most of the latest AC boats.

Most other types of modern keelboats use an integral wide flange plate at the top of the keel. This flange mates with a recess into the bottom of the hull. The bolts are well outboard of the fin itself, allowing a nice thin fin and proper structure.