Thank you for explaining the directed dependencies of the design decisions. So, the rudders on the Wantoo are more to the ends because they have to work against a heavier load for the same turning action, right? That is then the start of a cascade of dependent design decisions.
Luc
--- In harryproa@yahoogroups.com.au, Rob Denney <harryproa@...> wrote:
>
> I put the masts close to the beams, whose position was decided by the
> rudders mounted on them. Boom length was to keep them inside the hull ends
> and clear of the other mast if caught aback. ...
>
> There were also length constraints, space in the lee hull requirements and
> ease of sailing, particularly for novices and without rudders in shallow
> water or getting out through the surf to consider, all of which favour the
> schooner rig.
>
> Re your question, I suspect that if I scaled down the lee hull, the distance
> between the beams would scale as well.
>
> rob
>
> On Fri, Aug 26, 2011 at 8:00 AM, LucD <lucjdekeyser@...> wrote:
>
> > **
> >
> >
> > The Wooden boat design competition<http://au.groups.yahoo.com/group/Woodenboatdesigncompetition/files/>has two HP designs, Nols' Wantoo and Rob's Expeditionarry. To learn more
> > about HP's I tried to read the plans and understand in what way they are
> > comparable and in what way they are different and in what way that could be
> > tied in to the difference in their mission. Expeditionarry is a speed
> > machine and thus more true to the mission intended by this competition; I
> > suspect Wantoo has been more influenced by the mission of BD, namely, a safe
> > cruiser. Both have quite a number of fun "inventions". I first was quite
> > surprised about how few of these could be transplanted to the other design.
> > In hindsight I should not have been. There are probably quite a number of
> > features which I do not even know that I do not understand yet. Let me start
> > with with those that I do know:
> > The position of the masts are more at the extremities of the lee hull on
> > the Wantoo and that does not appear to be due to the length of the
> > boom/wishbone. This would make the boat more sensitive to the difference in
> > lift. Both designs choose to fix the position of the rudders to those of the
> > masts. As the Wantoo is about twice as heavy and has a lee hull about 20%
> > shorter would the position of the masts be a response to its slower speed?
> >
> > Luc
> >
> >
> >
> >
>