...how is the keel attached in your boat? It's a bulb keel right?
It's actually a little complicated..to explain..I'll try.
The boat has a structure bonded to the hull in the form of an "H" with many arms..that runs from the forward bulkhead to the area of the engine more or less.
Inside one of them, the keel box, there is an inverted box, that is solid and fits inside the space created by the structure. This box has a cut with the shape of the keel's profile.
Then, the keel enters the hull from bellow and passes thru the box. Once inside 2 3 or 4 inch bars cross the keel and attach it to the structure. These studs pass thru the keels internal beams, that are one piece.
Then, on top, 3 bolts very thick ones, tighten the keel verically, with a lid in steel that closes the box and prevents water and any movement.
This system was chosen because the keel is very thin, long and narrow, so attching it to the hull was not a good solution.
This system is very solid against groundings and allows the keel to flex without stressing the hull, since the loads are applied to the beams.
The photos bellow show the keel that is fully encapsulated and water tight.
The torpedo is shaped with 2 fibergalss halves, that enclose the lead. A door allows adding and removing lead, that is mixed with wax in the top, so you can scoop the lead out with some heat.
Shark for looks only and to scare the dolphins...