Bolger did a flat plate on the rudder for 'Romp' from Different Boats
because of the shallow draft requirement. He mentioned tht he thought
it should be deeper but the owner did not report any problems.
When explaining Eeek he said it was a 1/3 version of a proposed quick
and dirty off-shore cruiser and developed the shape to carry more
ballast 'farther aft' !! He said that he had sold a set of plans but
the purchased speced a standing lug (but he himself wasn't too keen
on). I'm not sure if she (the larger version) was ever built. He said
Eeek was okay to sail though.
My guess is that at speed you get a pretty healthy rooser tail similar
to what happens to baidarka shaped kayaks that also carry a deep vee
all the way to the end (but the kayaks handle great). I'd like to
see hope it would affect the rudder/steering).
Where did you come across Anhinga? I have never heard of her - but
then there is a lot I haven't heard of.
I was fascinated with the design oncept but with no easy engine
solution went on to other boats.
Thanks isometrics (as always)
--- In firstname.lastname@example.org, Clyde Wisner <clydewis@...> wrote:
> Sorry I can't spell Bruce and I must admit to looking at the lack of
> rocker and thinking evil thoughts. What if it had a box keel and a
> diesel (1GM10), could it become a "small motor sailer"? Many of us
> really liked that concept. Clyde
> Bruce Hallman wrote:
> > >
> > > . What subtle insights did
> > > you pick up?
> > I don't know if this is an insight, but one interesting thing to note
> > is the unusual Anhinga bottom which lacks any rocker aft. In the PCB
> > commentary on Eeek, he explains his hypothesis to be that more ballast
> > can be carried this way without added width to the midsection. The
> > obvious question is what turbulence might occur with the drag from
> > submerging more hull at the trailing end. And, I have a hunch, that
> > PCB was scheming the affect of the role of flat plate of the rudder,
> > versus this trailing turbulence. (Is Anhinga the first Bolger design
> > with a flat plate on the bottom of the rudder?)
> [Non-text portions of this message have been removed]