On Tue, 28 Aug 2007 19:44:11 -0500, "KLC Lewis"
wrote:

Sure there are -- but they aren't displacement hulls, either.

That gets you into a new discussion about what is a displacement hull.

I used to race on a boat called a B-29 that had a conventional lead
keel and a conventional spinnaker, a displacement hull to all
appearances. Sail area was a bit on the high side however, and on a
windy broad reach it could get onto plane and do 18 kts, about 3x hull
speed.