Just came across a collection of the discussion between ROb and
Joe Ostler. Joe was saying that the Harryproa concept couldn't work and
the ww hull would drag the boat round unacceptably. The Harryproa has
come a long way since then, even if the progress to acceptance seems
slow.
It's definitely great to see the performance of Rare Bird, as pointed
out, with no whitecaps to be seen. Especially since it's substantially
heavier than Blind Date. With the planned larger rig, that will be
some boat to behold.
Some of the old discussions were annoying at best. I'm glad to see
that the real world has proven the design -- no need to argue any more
about the ww hull forcing the whole boat to round up.
I think the new beam-mounted rudders are close to the center of the
boat. Without the hull-mounted bracket, they should also be less
draggy and create less spray. Being closer to the cockpit, though, it
will be interesting to see what happens to the spray they do create.
At least it's always to leeward!
---
Robert: speaking of spray, how does this relate to your
reverse-sheer-
You asked me for specific objections a while back, but I got busy and
forgot to respond. There were a few thoughts I had:
- Spray. I think your planned design may be more suited to racing,
where no one minds getting wet, than to cruising or multi-purpose use,
where it's nice to have the option of being as dry as possible. It
seems as if it would be easier to deflect spray with topsides that were
angled down towards the water, at least slightly, and a deck and stem
that aren't going to throw water or spray up. That said, I'm no expert
in how your intended design would work in terms of spray, so I could be
mistaken.
- Ease of construction. Rob's U-shaped bent panel seems to be about
as easy as it can get for a quick build. Switching to a compound shape
could add a lot of build time. Unless you're just talking about the
sculpted bows made of foam, which perhaps was your intention in the
first place.
- Reserve buoyancy. I like having a bow that keeps on providing more
buoyancy the further it gets depressed. That said, this may be just
because I grew up with bows like this, and am therefore used to it.
You make a good argument for a bow that sheds water from the top down
when the going gets rough.
As you can see, none of these are definitive stances. But I thought
I'd pose the issues anyway for discussion.
Any thoughts?
- Mike
Robert wrote:
--- In harryproa@yahoogrou
>
> There did not seem to be a great deal of wind . No whitecaps I
could see and the spray did not get blown away very quickly.
> I was thinking a spray rail would help
>
> --- In harryproa@yahoogrou
> >
> > Hi,
> > Yes, that rudder looked like it was raising alot of spray. I
keep thinking
> > that it might be good to move the rudders more towards the
center of the
> > boat on the large cruising boats that should never fly a
hull. Then you
> > could run straight from the rudders to the wheel and
eliminate a number of
> > blocks. Make it simpler and less friction.
> >
> > - Gardner
> >
> > On Wed, Jul 22, 2009 at 6:39 PM, sfbaysailingdad
<mitch.sailing@
> >
> > >
> > >
> > > It looks like there's something in the rudder assembly
that was catching
> > > the wave tops. Loved the look of the ride - calm and
fast - but would want
> > > to do something about that drag. Still searching for the
elegant rudder
> > > solution?
> > >
> > >
> > >
> >
>
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