[Public-list] #2

[J Bergquist]

John (birch this time)

Thanks so much. this is really helpful. I had never figured out a method to
determine backstay tension without bending the boat in this way. Very cool.
Thanks!

J

On 10/12/06, John Birch <Sunstone at cogeco.ca> wrote:
>
> Additional,
> Suggest telling sail make to account for 8-12" head stay sag, 12" more
> likely,  cut sail fairly flat, go either tri or bi radial. Suggest putting
> an adjustable backstay on. With adjustables suggest running a tight light
> line down the centre line from pushpit to pulpit, mark the mast where the
> line intersects the mast and then apply backstay tension until the line
> moves away from the mark. Then mark the backstay tensioner somehow with
> paint or marker or whatever because that is the maximum the backstay can
> be
> tensioned without bending the boat - adding more tension will achieve
> nothing except over stressing the boat.
>
> Your table:
> 0-14 full main, full #1.
> 15-18 Full #1, reefed main
> 18-22 #2, Full main - bladed out, max outhaul or first reef depending on
> weather helm - the latter might work better
> 23-28 #2, Double Reefed main
> Over 28, #3, reefed main.
>
> Just my 2 Cdn cents,
> Best of luck.
> Cheers,
> JB
>
> ----- Original Message -----
> From: "John Birch" <Sunstone at cogeco.ca>
> To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
> Sent: Thursday, October 12, 2006 9:15 AM
> Subject: Re: [Public-list] #2
>
>
> > I'd go heavier on the cloth. 7oz min and full hoist with less hollow -
> > think
> > I'd want the clew at the top of the lifeline and no higher if racing.
> >
> > Just my thoughts.
> >
> > Cheers,
> > John
> >
> > ----- Original Message -----
> > From: "J Bergquist" <jbergqui at gmail.com>
> > To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>;
> > "Alberg 30 Racing" <racing-list at alberg30.org>
> > Sent: Thursday, October 12, 2006 9:11 AM
> > Subject: [Public-list] #2
> >
> >
> >> Past Association Commodore Bob Kirk was kind enough to give me his old
> >> #2.
> >> I
> >> measured it last night with a friend in the middle of my street and the
> >> dimensions I found are as follows:
> >>
> >> Luff 31'4" with a 3'4" wire pendant at the top
> >> Foot 14' 11.5"
> >> Leech 30' 4"
> >> LP 14' 2.25" (this makes it a 135% sail)
> >> Height of LP 4' 8.75"
> >>
> >> This sail was very old and I did not have tackle to stretch it really
> >> hard,
> >> so we were just doing that by hand on my driveway. It says 'Ulmer"
> which
> >> apparently is UK before they were UK.
> >>
> >> There is a lot of leech hollow.
> >>
> >> I was surprised at the short luff. This seems strange to me for a #2. I
> >> expected the sail to be full hoist (luff dimension of at least 34 ft).
> I
> >> would be interested in hearing people's thoughts on these measurements
> -
> >> whether they are good numbers to shoot for, or whether they are too big
> >> or
> >> too small (particularly LP, foot dimension, and luff length).
> >>
> >> There was kind of a strange seaming pattern. One seam ran from clew to
> >> luff,
> >> ending a few feet above LP. Below this seam, panel seams ran vertically
> >> (more or less parallel to the luff). Above this seam, panel seams were
> >> cross
> >> cut (more or less parallel to the foot).
> >>
> >> I have gotten concrete sail quotes from UK, North, and Sail Rite. The
> >> Sail
> >> Rite guy assures me that if I build one of his sails it will be just as
> >> good
> >> as a brand name sail. My thought is not only will I save some money,
> but
> >> I
> >> will also get to learn how to do canvaswork which would enable me to do
> >> my
> >> own sail, cover, and upholstery repairs in the future.
> >>
> >> All the quotes seem to be built around cloth weight of 6.5 Oz to 7 Oz.
> >> Any
> >> thoughts on that?
> >>
> >> I appreciate y'alls patience and input on this. Sorry to be so dense. I
> >> just
> >> want to be an informed customer rather than just asking the sailmaker
> to
> >> figure everythign out for me. Since I am kind of an idiot when it comes
> >> to
> >> sailmaking, I am probably asking things that some of you think are
> silly.
> >> Again, preciate your patience.
> >>
> >> Kind regards,
> >>
> >> J Bergquist
> >> _______________________________________________
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>
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