"Calif Bill" wrote
Welcraft brought out the Airslot as an improvement on the Tri-hull. Made
the center deeper than the side sponsons.

Sponsons? Get outta here with that arcane nautical lingo, I just ride around
in boats, I don't build 'em. The pointy part in the middle sticks further
down into the water than the sides of my boat. This is the closest thing I
have to a head on view of it:
http://www.formulaboats.com/articles...Vintage&id=202 By the time
you get to the back (what you naval architects might call the stern) it's
more or less V shaped, which you can kind of see he
http://users.adelphia.net/~blizzard3...s/loweroff.jpg

I googled "airslot" and didn't find anything that looks much like my boat,
but I did find this interesting tidbit:
http://www.windycitypokerrun.com/formula-racing
Thunderbird was founded by Woodie Woodson in 1956 in the Miami, Florida,
area, producing boats that were exclusively trihull or "cathedral" design.
Decisively proving its staying power and stability, an eighteen-foot
Thunderbird made the first successful sterndrive crossing from Miami to
Nassau in 1959.

I had a friend in the 80s with a tri-hull boat, don't recall the make, and
it was a rough ride like you mentioned in the other post. Mine doesn't seem
nearly so harsh to me, and I doubt that I became any more tolerant of such
things in the intervening years. As I recall, his hull was a lot flatter in
general than mine.