Thank you for the additional pointers. The specs are very different. The L/B seems below 10 even for the lee hull. They went through several versions with, I guess, the last pictured on the Seabbatical web site. Apparently, they retained some sort of pod on both hulls. Would it be effective to counter capsizing? The rudders drawn seem Kelsall style. However, the Seabbatical blog describes Denney style rudder/boards. The rig is now clearly a twin wing masted mainsail. Where will the steering wheel go?

Seabbatical gives already a hint as to cost:
"Right now the material to build the shell is 80% of that required to build a 39 ft catamaran. But we are building a 16M or 52 ft boat with 24 ft beam only 2 ft draft and about 7 tons displacement. It should have more accommodation than a 42 ft cat with 4 queen berths in the hulls and room in the saloon for 4 - 6 kids to sleep. The performance should be equivalent to a 52 ft cat"

The crux, though, is the cost of ownership as Seabbatical rightly emphasizes.

If constructed as last drawn, this model may quickly gain the nickname "flying pancake" ;-)

luc
--- In harryproa@yahoogroups.com.au, Rob Denney <harryproa@...> wrote:
>
> Different to the spec I was using (low cost, low cost, low cost, island
> bunks, etc), but if I have to lose a client, I guess Derek would be the one
> I would choose to lose him to. Will be interesting to see how the proa
> problems are resolved. Interestingly, I have just sold a set of plans for
> a 15m flat panel Visionarry to a Peruvian who is having his boat built at
> the same yard (Ballotta). There are some more pics on their site.
> Ballotta are almost unique in that they give prices for completed boats
> once they have built them. Be very interesting to see the comparisons
> between the Kelsall cats and proa, the Stanton cats and the Vis.
>
> rob
>
> On Thu, Jul 25, 2013 at 10:02 AM, LucD <lucjdekeyser@...> wrote:
>
> > **
> >
> >
> > I guess Seabbatical is building a harryproa after all, be it in a kelsall
> > biplane rig version. It is called DRUA<http://longtermcharters.com/our-fleet/seabbatical-50-proa.html> and
> > is being built in Peru. Quite an exotic look & feel.
> > The SOR did change as bedrooms are all in hull.
> > I can see where this configuration is more attractive than catamarans.
> > No info on rig and rudder arrangement though.
> > I also wonder if the see through panes are glass or mosquito nets?
> >
> > Luc
> >
> >
> >
>