They are in a kind of cassettes. Local plastic machining company made
polythene/SS- bearings. Look at this:
http://prao.guillard.free.fr/description.htm
That boas has similar system to ours. (Thank you DJM builders for
excellent photos and ideas)
regards,
Arttu
> Arttu, I don't remember whether your rudders were in rotating
cassettes or externally mounted... if you used cassettes, how did you
source or build the bearings?
>
> Mike
>
> On Nov 20, 2010, at 1:11 AM, arttuheinonen@heinoset.net wrote:
>
> > Yes four boards in total. In the video we had both rudders down and some
> > board because the other had snapped. Last summer we realized that the
> > daggerboards are helpful when sailing under main only. Otherwise we do
> > not really need them. The boat can be shunted without daggerboards. I
> > guess this has something to do with the placement of rudders, they are
> > close to the bows on our boat. We usully keep both rudders down, adjust
> > the balance with the rear one if going upwind and steer with the rear
> > rudder sailing downwind.
> > Daggerboards add safety and help control the boat in bad seas because
> > they make steering easier, the boat is easier to control. This has
> > nothing to do with rig type, it is about hydrodynamics. There is no
> > rocker you see.
> >
> >
> >
> >> I made an argument for least amount of; and balance for shunting craft
> > on the other group Sloop vs Schooner. Showing what I thought a shunting
> > crafts helm balance should and shouldn't be. So you have four boards
> > total. And only use two at a time. Sounds like a spiral up not down.
> >>
> >> I posted it here under (forces at play)for anyone to pick it apart to
> > school me. Granted its a sloop vs schooner, not the easy rig. But in
> > principal still the same.
> >>
> >> Todd
> >>
> >> --- In harryproa@yahoogroups.com.au, arttuheinonen@... wrote:
> >>>
> >>> No. It was broken, so there was no other daggerboard. It broke when
> > I forgot it down and accelerated to 16-17 knots and the sails were
> > sheeted too tight.
> >>>
> >>>
> >>> Arto Hakkarainen [ahakkara@...] kirjoitti:
> >>>> Thanks for the video. I see you raised one daggerboard when
> > starting to shunt. Was the other dagger board already lowered?
> >>>>
> >>>> Arto
> >>>>
> >>>> --- On Thu, 11/18/10, proabuilder <arttuheinonen@...> wrote:
> >>>>
> >>>>
> >>>> From: proabuilder <arttuheinonen@...>
> >>>> Subject: [harryproa] Visionarry shunting
> >>>> To: harryproa@yahoogroups.com.au
> >>>> Date: Thursday, November 18, 2010, 6:58 PM
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> Hi
> >>>>
> >>>> Visionarry shunting on video to get some idea of shunting.
> >>>> Sorry about bad quality. We were going downwind. If we were going
> > upwind there would have been more action.
> >>>>
> >>>> http://www.youtube.com/watch?v=-URL2jyXiAU
> >>>>
> >>>> Regards,
> >>>>
> >>>> Arttu
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>
> >>
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo!7 Groups Links
> >
> >
> >
> >
>