"Thom Stewart" wrote
A Cape Cod Cat has a Big Barn door rudder BUT If Nellen got the Rudder
of an Atlantic City Cat out of the water; That Cat was CAPSIZED!!!

It does have a big heavy long rudder that's hung off the transom. But, it's shallow. Only about
two feet. It comes out of the water easy. Especially when heeled way over because the hull is wide wide.
When it's heeled way over the rudder comes out. It's called leverage, I think.

The Atlantic Cat has an Internal Rudder out the bottom of the boat! So
does the "Freedom" As does most Catboats of modern design.

Internal rudder???? Maybe you mean a centerboard? Catboats, traditional catboats, have centerboards
not fixed keels. Show up at the Catboat Rendezvous with a Nonsuch and they'll laugh at you.

There was a very simple reason for the Darn Door Rudder, If Ellen had
any "Salt" at all, the reason should be obvious.

It's because of the shallow draft of the hull when the centerboard is raised up. Duh! You can't
make it deep because it will go aground. So you make it long.....

Cheers,
Ellen