Another good thing no flogging of the sail. Laser friends rigging in 14+ knots of wind noisy as hell. I just simple raise the sail with the halyard as the sail just weather vanes around very controlled with very little noise. Shove of the beach and sheet in very easy process and away I go. While others struggle to sail back wards or situate there boats to leave the shore.
Pic of current sail set up in non harry photo's files
Todd
--- In harryproa@yahoogroups.com.au, Mike Crawford <mcrawf@...> wrote:
>
>
> The junk battens are a lot stronger than normal squaretop main
> battens, and since each one gets its own sheet, the compression forces
> on the junk battens are actually smaller. It would take a lot to break
> them.
>
> Of course, you can break any rig running downwind if the wind is too
> high. You have to be able to depower the rig and then reef it when needed.
>
> For the junk, as with an unstayed una or easyrig, you can sheet out
> until there's no stress, reef, and sheet back in. As with the other
> unstayed rigs, there are no worries about getting pinned against the
> shrouds and being unable to reef. But unlike the other rigs, the junk
> will be easier to reef and get back underway, especially if you're the
> only one on deck and you don't want to leave the cockpit.
>
> There's a reason these rigs have been used for thousands of years. At
> this point, the challenge is to take the advantages of a junk (lower
> stresses, easier handling, semi-balanced, easy to wing-on-wing), and
> learn how to fine-tune the rig for better windward performance.
>
> Being able to cut the sail and pockets so that the sail forms an
> airfoil, or alternately, go with a double-skinned wing foil, takes the
> junk out of the "easy but slow" category and makes it attractive to
> people who want speed as well.
>
> - Mike
>
>
> Doug Haines wrote:
> >
> > OK, junk saiilors, say you are runmning down wind and it is really
> > blowing hard then on the "wrong" side of the mast you shouldhave
> > thebatten gettingbent across the mast - you could even break it (batten).
> >
> >
> > --- On Sat, 28/5/11, Rudolf vd Brug <rpvdb@...> wrote:
> >
> >
> > From: Rudolf vd Brug <rpvdb@...>
> > Subject: Re: [harryproa] Re: Swing-wing rig....junk
> > To: harryproa@yahoogroups.com.au
> > Date: Saturday, 28 May, 2011, 23:57
> >
> >
> >
> > Ben,
> > There have been reports from different people using junk rigs
> > saying there is little or no difference between tacks.
> > This can be measured by taking bearings on each tack backed up
> > with GPS. They also claim if there is a difference, the "wrong"
> > tack allows them to sail closer to the wind.
> > Regards,
> > Rudolf
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: bjarthur123 </mc/compose?to=bjarthur123@...>
> > To: harryproa@yahoogroups.com.au
> > </mc/compose?to=harryproa@yahoogroups.com.au>
> > Sent: Saturday, May 28, 2011 3:09 PM
> > Subject: [harryproa] Re: Swing-wing rig....junk
> >
> >
> >
> > "in actual fact" implies you have quantitative data. to me
> > that means two boat testing. have you compared the favored and
> > unfavored tacks in this way?
> >
> > ben
> >
> > > My junk rig has an airfoil shape cut into the panels, with a
> > draft of 1/3 the chord length. A junk rig with an airfoil
> > shape is essentially the same as a big, modern square top
> > mainsail. The only difference really is that the sail does get
> > pushed around the mast on one tack....
> > > But think about this. On the "favoured" tack with the mast
> > to windward, the sail will set a great shape, but the mast
> > will be exposed to the wind and creating drag. On the so
> > called less favoured tack, the mast is hidden in the shadow of
> > the sail, and creates very litle drag. So in actual fact,
> > there is no noticable drop in performance due to the contact
> > between the sail and mast. Sure it looks a little weird, but
> > who really cares?
> > >
> > > Also, the leading edge of a sail is very sensitive to
> > turbulence, and a marconi rig with a mast right at the leading
> > edge of the sail will hurt it's efficiency big time (unless
> > the mast rotates), whereas a junk rig will not.
> >
>