A much better solution than the one i suggested. Still big structural worries (smaller the boat, the less these are), and control forces (if the back half moves relative to the direction, no problems. If the front half moves, huge problems) and it is solving a problem that is not a big isue on harryproas. Be great to see what you came up with on a small one.
What about two lw hulls, each with two bows and say 16' long, joined bow to bow with a Wharram type rudder lashing? Not the most smooth of hulls but usually there is non-laminar flow by midships plus many boats have lots of turbulent making bits hanging off the hull. Would be no worse than a boat with a bit of weed on the bottom? Obviously not a racing setup but adequate for mucking about and cruising?
--- In harryproa@yahoogroups.com.au, Rob Denney <harryproa@...> wrote:
>
> I, and I suspect, many others have thought about it, but the mechanics of
> building it, and sealing the gap in both directions has always been
> insurmountable. Plus, you still need enough foil in the water to prevent
> leeway, so the added complexity does not get paid for by reduced wetted
> surface.
>
> rob