G'day,

So the aft end will clear the cabin. Pretty unlikely scenario, but
one that had to be allowed for.

regards,
Rob

On Jan 9, 2008 7:36 PM, Doug Haines <doha720@...> wrote:
>
>
>
>
>
>
> Why is the boom so high off the hull/deck level?
>
> Robert <cateran1949@...> wrote:
>
>
> Theoretical max is one hull in the water with max sail availability.
> Looks like you could do with another couple of meters on the mast if
> you want to race, otherwise just enjoy the safe cruising. Certainly
> looking forward to your cruising story. Hope you write it up with pics
> for multihull magazines. Unfortunately I lost most of my pics when I
> cruised in a 6.5m aluminium tri from Port Moresby to Thursday Island.
> It may be worth backing up with some disposable waterproof cameras
> and waterproof paper for your notes and a dictaphone. If you like I
> can send you some waterproof paper left over from my estuary research.
> Robert
> --- In harryproa@..., Doug Haines <doha720@...> wrote:
> >
> > Hi
> >
> > I went under yesterday and cleared top of mast by less than 6
> inches - tide was higher than expected.
> >
> > I try sometimes to see if Sidecar will fly, but maybe if take gear
> out, roof off and sit to leeward. Is this necdessarily as fast as
> having two hulls in the water or would that mean that you are not
> getting a maximum force in the sails?
> >
> > Doug
> >
> > Robert <cateran1949@...> wrote:
> > My sense of safety as to weight of ww hull is how much
> windage there
> > is under bare poles for the stability of the boat when it starts to
> > really blow. A large part of the weight of a cruiser is all the junk
> > carried for cruising. A Harry cruiser unloaded for racing has a good
> > power to weight ratio and an excellent stability so it should be able
> > to be moderately competitive as is, but if you are going to extremes
> > offshore, then I can see Rob's mast shortening coming into its own.
> >
> > For going under the bridge, maybe you can fly a hull to reduce the
> > mast height(:<)
> > Robert
> >
> > -- In harryproa@..., Doug Haines <doha720@> wrote:
> > >
> > > Hi,
> > >
> > > Was wondering where the cut off point is in flying a hull racing
> > and not flying a hull on a cruiser? How light do you need to keep a
> > cruiser to be able to match it with racers? Can you do it safely?
> > > Example boat - Visionarry LW hull, and Harry WW hull.
> > >
> > > Doug
> > >
> > > Doug Haines <doha720@> wrote:
> > > Hi,
> > >
> > > You then have a large section at the top, this is adding windage
> > maybe weight.
> > >
> > > I extended about 50cm to Sidecars two masts and can now sailo
> > under a bridge here at about mid to low tide. The other bridge in the
> > down stream direction is much lower, 5m and would suit a telescoping
> > mast but will leave it up to Rob to sort out first.
> > >
> > > Doug
> > >
> > > Rob Denney <harryproa@> wrote:
> > > G'day,
> > > Both pieces of luff are attached with slugs/slides in an integral bolt
> > > rope track.
> > >
> > > There is a discontinuity at the join, but should be no problem as the
> > > nearest slides will be a couple of feet above and below it.
> > >
> > > The top part of the sail is always on the top mast. The top mast is a
> > > bigger section than the bottom mast, so lowers over it.
> > >
> > > regards,
> > >
> > > rob
> > >
> > > On Jan 2, 2008 11:11 PM, George Kuck <chesapeake410@> wrote:
> > > >
> > > >
> > > >
> > > >
> > > > How is the luff attached to the upper mast so that it can be
> > lowered to the
> > > > bottom mast or is the upper luff free flying ? Is there a slot or
> > track for
> > > > the sail slides to run in and how will it transition from bottom
> > mast to top
> > > > mast ?
> > > >
> > > > George Kuck
> > > > Chestertown, MD
> > > >
> > > > Rob Denney <harryproa@> wrote:
> > > >
> > > > G'day,
> > > > >
> > > > > Can the mast be lowered while the sail is powered up under load,
> > when it
> > > > > would be most needed to lower it ?
> > > >
> > > > No, but the on part mainsheet (with 4:1 fine trim) can be eased very
> > > > quicklywhich allows the rig to weathercock, completely depowered.
> > > >
> > > > >What would the procedure be.
> > > > Dump sheet, stroll across the dry, near stationary trampoline,
> release
> > > > the mast halyard (I will need to come up with some better names for
> > > > the various lines, will ask for suggestions once I know what works),
> > > > which lowers the top mast, with the sail attached and simultaneously
> > > > lowers the bottom part of the sail. Mothe clew and luff downhauls to
> > > > their new attachment points, sheet on and sail away. To drop sail
> > > > completely, do the above,m then trip the halyard l;ock and the top
> > > > part of the sail comes down.
> > > > >
> > > > > Do you have a back up mast or plan for one if the extendable
> > mast should
> > > > > prove not to be practical ? (not that it would be) or would you
> > have to
> > > > > start from scratch ?
> > > >
> > > > As it has to fit in a container, I would make a new top piece
> with an
> > > > internal sleeve. However, I would put up wth a lot of practical
> > > > problems to have a wing mast which can be reduced in height, weight
> > > > and windage by 50% I cannot any major reasons for it not to work
> > > > (often the way at this stage of the process ;-)) Plenty of potential
> > > > detail problems to solve, but the principle seems sound.
> > > >
> > > > regards,
> > > >
> > > > rob
> > > > >
> > > > > George Kuck
> > > > > Chestsertown, MD
> > > > >
> > > > >
> > > > > Rob Denney <harryproa@> wrote:
> > > > >
> > > > > G'day,
> > > > >
> > > > > You aren't the only one who hopes it works!
> > > > > .
> > > > >
> > > > >
> > > > >
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