Subject: Re: [harryproa] Re: 15m schooner underway
From: Rob Denney
Date: 5/15/2013, 10:00 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

There is a best separation, but I don't know what it is.  I set up El with the booms as long as possible, in the hope that the foresail would act like a jib.  Was only relevant hard on the wind and juudging by the lack of force in the aft sail sheet, may not have been correct.  


Flasharry has a bit more seperation  to maximise space in the lee hull and minimise extra bulkheads etc.  

It is generally accepted that sailing directly behind another boat the wind is a) bent, b) reduced in velocity and c) more disturbed so too big a separation is probably not a good thing. 

rob  

On Wed, May 15, 2013 at 2:22 PM, Doug Haines <doha720@yahoo.co.uk> wrote:
 

Hi Rob,

I am interested in how you (you and owner/builder) are planning to space the two masts apart.

Is there any ideas on optimum separation for sailing efficiency?

On Sidecar it was restricted a bit so that there was no gap left from boom 1 to mast 2.

In doodling a bigger boat it seems like one could squeeze a metre or two of open air in between.
This could be a major change on how fast you go (in certain conditions).

Dou
Perth

--- In harryproa@yahoogroups.com.au, Rob Denney <harryproa@...> wrote:
>
> On Mon, May 13, 2013 at 5:54 PM, Doug Haines <doha720@...> wrote:
>
> > **
> >
> >
> > The savings of taping is good too.
> >
>
> Would be if it had happened. Needs a bit more work to make it time
> effective as well as materials effective. Working on it.
>
> >
> > though you still have fiddly parts to go.
> >
> True, but not as many as most boats. The bunks are in, the seats and
> galley are mostly folded up from flat panels and the bulk of the cabin top
> is a flat sheet, bent.
>
> > I think people over engineer when doing a bit of amatuer designing at home.
> > Eg rudder, beam to hull joins.
> > Feels safer to add more.
> >
>
> Not just amateurs, a lot of pro designers and builders also add a little
> more to feel safer. No problem if it is not their money being spent.
>
> >
> > Is this (FlashHarry) a schooner or single?
> >
> Schooner. 2 masts the same as the ones on Rare Bird/Blind Date, but with
> no jibs, so about 50% more sail area.
>
> rob
>
> >
> > Doug
> >
> > --- In harryproa@yahoogroups.com.au, Rob Denney <harryproa@> wrote:
> > >
> > > On Fri, May 10, 2013 at 4:27 PM, Doug Haines <doha720@> wrote:
> > >
> > > > **
> > > >
> > > >
> > > > Hi Rob,
> > > >
> > > > Thanks for the update pics.
> > > > It looked like a thick piece of plywood in the first pic, but obviously
> > > > light brown coloured foam.
> > > > Pretty thick at 15mm?
> > > >
> > > It's a big boat, with some big spans, although most of them are
> > reinforced
> > > with furniture etc, so 15mm.
> > >
> > > > How was the glassing done - one side under pressure then bend while
> > other
> > > > side is wet?
> > > >
> > >
> > > For the hull bottom, yes. The rest was glassed both sides then vacuumed.
> > >
> > > >
> > > > This was the major attraction to going flat panel for me. No worries
> > > > bending to shape.
> > > >
> > > Agreed. The lee hull will be built with a flat bottom.
> > >
> > > > I know the straps can pinch in to make undulations - you obviously used
> > > > some aluminiukm beams to try and spread the load at the edges.
> > > >
> > > Yes, may have been better with holes through the topsides and pulled the
> > > shape from gunwh'l to gunwh'l rather than around the hull.
> > >
> > > > I think you had a solide glass bilge on the Sol.
> > > >
> > >
> > > Yes. Smaller diameter, but folded pretty easily.
> > >
> > > rob
> > >
> > > >
> > > > Doug
> > > > Perth
> > > >
> > > > --- In harryproa@yahoogroups.com.au, "proaharry" <harryproa@> wrote:
> > > > >
> > > > > Latest update now at www.harryproa.com.
> > > > >
> > > > > Made a couple of bulkheads yesterday on the small table. To speed
> > things
> > > > up, we made them in a stack with a piece of peel ply between them.
> > Laminate
> > > > looks good apart from a couple of bag creases on the table side.
> > However,
> > > > we lost any time savings by spending all morning wedging them apart to
> > > > break the peel ply join. What a struggle! Perforated plastic next time.
> > > > >
> > > > > Installed the bulkheads this afternoon with some help from Jeff, the
> > > > scone king. Looks good. Next big step will be putting the saloon roof
> > on.
> > > > In theory, not too difficult, but the sheer size of it will throw up
> > some
> > > > interesting problems.
> > > > >
> > > > > rob
> > > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
>


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