I was thinking about how to adjust the sail as it accelerates. make a
cam that meats the sheet o that as the drogue or fishing lure adds
tension, then the cam increases the rig tension. With enough lever
arm, just the bibbed fishing lure should be enough.
FOr the steering, less mechanical advantage is needed for steering
the front rudder as it is more lightluy loaded. Off the front
crossbeam would have cleaner air, but when shunted, could be pivoted
as Ted suggests and then used on the same rudder with greater
mechanical advantage.
--- In harryproa@yahoogrou
>
> G'day,
>
> There are two things to solve. First is keeping the boat on course,
> and Robert's idea seems sound for this. The second is, that as the
> boat accelerates, the app wind comes forward, the sails luff and the
> boat slows down. Therefore, if we are to sail a compass or true wind
> course at top speed, we need also to have some means of trimming the
> sails. with the easy rig, this may be able to be done with the
> fishing lure (probably need a small drogue) as well.
>
> This subject is also being discussed by Dave Culp and Tom Speer (both
> cleverer than me at this sort of stuff) on the AYRS (Amateur Yacht
> Research Society) chat group, a bunch of boat oriented free thinkers
> who amongst other things told me how to calculate the number of holes
> required to drain a flooded solid bridgedeck. Depends on the orifice
> coefficient, apparently!
>
> Looks like Rare Bird is racing in the Brisbane Gladstone this year.
> Waiting to hear from QMYC whether we will be official or not.
>
> regards,
>
> Rob
>
> On Wed, Feb 11, 2009 at 4:41 PM, <arttuheinonen@
> > Hi,
> >
> > Duplicate lights, manually operated. Switch on the pedestal. We put
> > red/green lights x2 on the lee hull and extra red and green lights on
> > the ww hull side . Accessory mast wont work for tricolor because
the rig
> > shades it for the lee side. Steaming/anchor light is on the ww top.
> >
> > I would like to have a wind vane self steering, but havent found a way
> > to do it. It is a difficult one. I guess we must forget the
electricity
> > free wind vane. Any ideas ???
> >
> > -Arttu
> >
> > Hi,
> >
> >> I haven't seen mention of some of the issues with proas having
> >> interchangeable bows. I assume these have all been solved, but I am
> >> curious
> >> how:
> >>
> >> 1) bow and stern lights - red and green have to be reversed after
> >> shunting.
> >> I assume duplicate sets of lights, but it is a manual operation to
> >> remember
> >> each time?
> >>
> >> 2) autopilots - don't these get really confused after a shunt? Do
they
> >> also
> >> need to be duplicated? (expensive)
> >>
> >> 3) radar/chartplotters
> >>
> >> 4) masthead lights? i think i saw a post somewhere that rob
mentioned he
> >> didn't care for masthead lights, although a central tube up the masts
> >> could
> >> be mounted to keep the lights from rotating with the mast, but
where else
> >> can you put the lights without the sails obscuring them?
> >>
> >> Thanks!
> >>
> >> - Gardner Pomper
> >> York, PA
> >
> >
>
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