I own an M-20 scow sailboat. This is a Melges tunnel hull scow. The tunnel is only in the center of the boat as the bow and stern are typical scow sections. The boat is sailed flat unlike most scows which are sailed on their side. It is very fast off the wind when the bow picks up and it gets on plane. The wake looks like a powerboat. The ltest wersion of the M-20 nis an I-20 which uses a spirit pole and genniker for even high speeds on a reach. The web sites are
http://www.inland20.org/ and
http://www.m20scow.com/.Lance