After following the discussions on the advantage of proas, and
around with a layout for a liveaboard version, along with very limited
info about the upcoming charter version of the harryproa, I realized
that I seem to be missing some basic points.
The proa has an advantage because all the stresses are concentrated in
a small portion of one hull. That seems to be mostly due to the
ballestron (sp?) rig.
Weight and cost can be kept down by keeping accomadations out of the
hulls and putting them on a bigger bridgedeck. That would apply to
So, I am wondering, if you design a bi-rig cat with a freestanding
ballestron rig in each hull and just put everything up on the
bridgedeck, wouldnt that work pretty much as well as the proa concept?
It would seem that the weight would be about the same.
Things would be different; you would have 2 identical hulls to build,
somewhere near the average of the ww and lw hull sizes. That should be
easier. You only have to sail in one direction, which would make the
rudder and wheel designs easier. You could mount inboard diesel
engines, which would be handy for liveaboard crusing, so you can
travel when there is no wind. You do need 2 masts, and they would have
to have shorter booms, so they don't run into each other.
Can someone give me a clearer picture of the inherent advantages of a
proa? (not compared to cruising fat cats, but for a liveaboard couple,
wanting a small level of comfort)