does this work for you past the registration ?
https://cc.readytalk.com/cc/playback/Playback.do?id=3dpmfe
--- In harryproa@yahoogroups.com.au, "fvonballuseck" wrote:
>
> Did you find the presentation?
> I went but could not locate it - any advice?
> thanks Fedor
>
>
> --- In harryproa@yahoogroups.com.au, "rob_rassy" wrote:
> >
> > Thanks for pointing that out Luc, I had missed that in the Pecha Kucha
> > presentation. I had assumed there would be a track from the 15M schooner
> > drawings. but this is a really nice simple solution. It pivots,
> > turns lifts all with two component parts (excluding the rudder
> > blade pivot pin)
> > I imagine there would be a cross hull tube for it to mount in, so I
> > wouldn't call it a hole as it would add strength to the hull and not
> > detract from it
> >
> > Rob Rassy
> >
> > --- In harryproa@yahoogroups.com.au, "LucD" wrote:
> > >
> > > In the recent Pecha Kucha presentation Rob shows a rudder design I was
> > not familiar with. I guess it is the one I could not decipher from the
> > drawings of the schooner vis on the hp web site. Of course compromises
> > are made (like there is a hole in the hull, symmetric foil, ...) but it
> > looks again so elegantly simple as I can already guess how the potential
> > disadvantages of some features are covered for by other parts. The whole
> > presentation to me is an illustration of the title that Rob merits: Zen
> > guru in the art of sailboat design. Maybe to bring out this image to
> > those not in awe by the drawings at first glance, Rob should shave his
> > head ;-) Marvelous.
> > > Luc
> > >
> > > --- In harryproa@yahoogroups.com.au, "rob_rassy" wrote:
> > > >
> > > >
> > > >
> > > >
> > > > I agree Rob's original design is probably the best solution. After
> > all he did go out and do the actual testing and didn't lose sight of his
> > goal of lightweight and simple. They are proven to work and achieve all
> > the desired features (lift able, kick up, reversible, serviceable) with
> > a minimum of fuss
> > > >
> > > > My only concern with the original design is the lower pivot mount,
> > which I feel is to, low and will become a hand break when the boat is
> > pushed. I have considered other ways of mounting them higher but the
> > problem is the same as the beam mounts they get heavier the further they
> > are from the water
> > > >
> > > > My most recent thoughts are trim tabs on (close to) both ends of the
> > lee hull bottom to counter the asymmetric thrust /drag forces of the
> > Harry (weight to windward) design. They would be semicircular
> > self-retractable (spring loaded), and set in slot at a fixed angle or
> > could be in a drum for extra adjustment and complication.
> > > >
> > > > If the rounding up forces were removed or reduced the beam mounted
> > rudders would come into calculation for me. At the moment I feel the
> > beams mounts are not wide enough apart to perform this job with out
> > being to large.
> > > >
> > > > I am open to being convinced otherwise though
> > > >
> > > > Rob Rassy
> > > >
> > > >
> > > > --- In harryproa@yahoogroups.com.au, "von Balluseck, Fedor" wrote:
> > > > >
> > > > >
> > > > > Nice discussions!
> > > > > Think the drum 'outside' is going to be in size comparable to the
> > first generation of rob's rudders - if not bigger - like on Visionary.
> > > > > Keep in mind those rudders are fairly big - and to get the balance
> > right the rudders have to be either angled or the moved about15-20% back
> > (longitudinal? ) So the drum is big - not sure but would guess
> > 60-100cm's on Visionary.
> > > > > Maybe you can reduce the size of the rudders if you go for
> > additional leeway protection measures - but that stirs up the
> > 'additional boards question.
> > > > > Browse back in the posts - there was a long discussion on multiple
> > boards or a lee-board that could pivot. Rick W makes a point that
> > against intuition and leeboard on the WW side of the lee hull would be
> > most efficient.
> > > > > I believe Arttu's Ono visionary has added 2 boards to the original
> > 2 rudders - and he has shared some comments on how this is working (but
> > no protection against grounding)
> > > > >
> > > > >
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