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<DIV><FONT face=Arial size=2>Mike this is wonderful - I take it the measurements
are in foot pounds?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Hope everyone had a great Christmas/Festive
season.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>John</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A href="mailto:sail_505@hotmail.com" title=sail_505@hotmail.com>Mike
Lehman</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
href="mailto:public-list@alberg30.org"
title=public-list@alberg30.org>public-list@alberg30.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, December 27, 2001 8:15
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Alberg30] tunning, shroud
tension</DIV>
<DIV><BR></DIV>
<DIV>
<DIV>
<P><BR><BR></P></DIV>
<DIV></DIV><BR><BR><BR>Mike Lehman
<DIV></DIV>"Gilleleje" #505
<DIV></DIV>(410) 544-9067
<DIV></DIV>
<DIV>
<DIV></DIV>
<P>I couldn't find the refernce to the member list topic. Generally what I
have found is to set the mast as far forward on the base as possible, This
positions the mast over the beam better. Tighten the upper shrouds to equal
tension keeping the top directly over the base (this takes some practice). A
trick is to use the main halyard, moving it from port to starboard and
measuring lining it up with a fixed object on the deck, such as turnbuckle.
This will help you keep the mast plumb, side-to-side. (a word of caution: on
Carnival Lady US17 the mast leaned to one side after this proceedure and Phil
Beigel had a hard time figuring out why, until he pulled the boat and measured
from the bottom of the keel to the toe rail on each side...one side was 3"
higher than the other side! US17 was one of the original boat and a lot of
things were done by hand) Now that you have equal tension on the uppers and
the head of the mast is directly over the base, tighen the forward lowers
until! there is 4-6" prebend at the spreaders (you are actually pulling the
center of the mast forward at the spreaders with the forward lowers). Finally
tighten the aft lowers just enoug to take the slop out. Attached is a a
speadsheet that has the tensions recorded of several boats. The variance is so
great boat-to-boat that it is hard to make sense of this without knowing the
individual boats and how they perform. Racing boats are indicated by an "R"
and generally carry a taughter rig. Hope this helps, at least it's something
to ponder over the cold winter months.<BR><BR></P></DIV>
<DIV></DIV>
<DIV></DIV><BR><BR><BR>Mike Lehman
<DIV></DIV>
<DIV></DIV>"Gilleleje" #505
<DIV></DIV>
<DIV></DIV>(410) 544-9067
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>----Original Message Follows----
<DIV></DIV>
<DIV></DIV>From: Brian and Elaine Timmins <TIMMINS@OPTONLINE.NET>
<DIV></DIV>
<DIV></DIV>Reply-To: public-list@alberg30.org
<DIV></DIV>
<DIV></DIV>To: public-list@alberg30.org
<DIV></DIV>
<DIV></DIV>Subject: Re: [Alberg30] tunning, shroud tension
<DIV></DIV>
<DIV></DIV>Date: Wed, 26 Dec 2001 21:41:14 -0500
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>Check members list, May 1 (digest of May 2), 2001
<DIV></DIV>
<DIV></DIV>Topic.... "Alberg 30 Tensions"
<DIV></DIV>
<DIV></DIV>I used this as a guideline when tuning my boat this past season. It
worked
<DIV></DIV>
<DIV></DIV>VERY WELL!!!
<DIV></DIV>
<DIV></DIV>I ended up 1st in class under PHRF in my club. Also had highest
point count
<DIV></DIV>
<DIV></DIV>of the entire fleet. Admittedly we're a small group of freindly
racers, not
<DIV></DIV>
<DIV></DIV>grand prix.
<DIV></DIV>
<DIV></DIV>Regards,
<DIV></DIV>
<DIV></DIV>Brian #497
<DIV></DIV>
<DIV></DIV>----- Original Message -----
<DIV></DIV>
<DIV></DIV>From: <JPGRATHWOL@AOL.COM>
<DIV></DIV>
<DIV></DIV>To: <MEMBER-LIST@ALBERG30.ORG>
<DIV></DIV>
<DIV></DIV>Cc: <PUBLIC-LIST@ALBERG30.ORG>
<DIV></DIV>
<DIV></DIV>Sent: Wednesday, December 26, 2001 5:37 PM
<DIV></DIV>
<DIV></DIV>Subject: [Alberg30] tunning, shroud tension
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>> In the two summers I have sailed my A30 I have focused on
things other
<DIV></DIV>
<DIV></DIV>than tuning and shroud tension. I have sailed with a straight up
mast,
<DIV></DIV>
<DIV></DIV>"tight" uppers and slightly "looser" lowers. I am speaking
"loosely" of
<DIV></DIV>
<DIV></DIV>course. I have managed to maintain a helm that is nicely balanced
when even
<DIV></DIV>
<DIV></DIV>heeled and turns strongly to windward when healing angle is
increased. And
<DIV></DIV>
<DIV></DIV>I am naturally happy with these results.
<DIV></DIV>
<DIV></DIV>>
<DIV></DIV>
<DIV></DIV>> Sometimes when sailing to windward I feel I am not performing
as well as I
<DIV></DIV>
<DIV></DIV>should, not pointing as high nor making the speed I should. My main
sail
<DIV></DIV>
<DIV></DIV>seems very full also, too full--slot choking full, as if it were
cut for a
<DIV></DIV>
<DIV></DIV>mast with some fore aft pre-bend tuned into it. Sailing with a
relatively
<DIV></DIV>
<DIV></DIV>less experienced crew (my wife) and without another A30 as a pace
boat, it
<DIV></DIV>
<DIV></DIV>has been difficult to answer my own performance questions. (My
sails aren't
<DIV></DIV>
<DIV></DIV>brand new nor are they blown out--at least from a
non-top-of-the-fleet
<DIV></DIV>
<DIV></DIV>racing point of view).
<DIV></DIV>
<DIV></DIV>>
<DIV></DIV>
<DIV></DIV>> What I'd like to know is whether a straight mast is the
standard. Or is
<DIV></DIV>
<DIV></DIV>it common for A30s to tune the mast with a small 4"-6" fore-aft
prebend in
<DIV></DIV>
<DIV></DIV>it, as I often see in other keelboats. Second what range of
tensions are
<DIV></DIV>
<DIV></DIV>common among racers and cruisers. I don't have, nor do I plan to
get soon,
<DIV></DIV>
<DIV></DIV>an adjustable backstay. If anyone has any thoughts to offer on
these
<DIV></DIV>
<DIV></DIV>questions I'd appreciate it. (Also I have an older boat, #88, and
have
<DIV></DIV>
<DIV></DIV>already had my mast beam reinforced. While I'm not looking to drive
the
<DIV></DIV>
<DIV></DIV>mast down through the deck, I don't think planning my sailing
around a
<DIV></DIV>
<DIV></DIV>weakness that can be repaired if it reappears is this way to go
either.)
<DIV></DIV>
<DIV></DIV>>
<DIV></DIV>
<DIV></DIV>> I think I saw some time back an informal survey complied by
Mike Lehman of
<DIV></DIV>
<DIV></DIV>various boat's shroud tension(s). I can't find this anywhere in the
<DIV></DIV>
<DIV></DIV>archive. Does anyone remember when or where this information is
archived?
<DIV></DIV>
<DIV></DIV>Or Mike do you still have this info? In a form that can be posted?
<DIV></DIV>
<DIV></DIV>>
<DIV></DIV>
<DIV></DIV>> Thanks
<DIV></DIV>
<DIV></DIV>>
<DIV></DIV>
<DIV></DIV>> John Grathwol
<DIV></DIV>
<DIV></DIV>> Dovekei #88
<DIV></DIV>
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