I'm not going to get into the mast butt issue here, but I do want to comment
on forestay length. A few years ago the class increased the max forestay
length by 3" to 27' even (I think!, it's in the rules on our website). This
was because most Tunas had lee helm in most conditions so people were always
trying to get to max length, and that is the hardest measurement to make
(this happened while I was measurer). Carlos' forestay is halfway between
the old max and the new max, i.e. 26' 10.5" (or so), and I think Michael
Andrews set up Bonito the same way.
So depending on what sails you have and how much you like to heel the boat
in light to moderate air, the optimum length may be less than max. I hope
it is, because that's one of the reasons we changed the rule. But Pariah
beat me in Nationals two years ago, maybe Mike knows better.
Ernie and Michael, as duelling Nationals champions, do you guys want to tell
the rest of us how long your forestay is currently? No pressure, of
course...
Jan Grygier, "Carlos"
hydrophilos at earthlink.nethttp://home.earthlink.net/~hydrophilos/spigot.html
P.S. Speaking of Nationals, we are getting to have some pretty hot new
sailors up here (I'm counting Mike in that list because he didn't sail much
the last two years), Nationals should have some very good competition. I
know you all know it's the last weekend in July (24-26) out of Corinthian
YC, but an occasional reminder never hurts.
_____
From: tuna-bounces at myfleet.org [mailto:tuna-bounces at myfleet.org] On Behalf
Of Michael Kennedy
Sent: Wednesday, March 11, 2009 6:27 AM
To: djmeyer16 at yahoo.com; tuna at myfleet.org
Subject: Re: [Santana 22] Filing the mast butt
Hi Derek
You want to file the aft part. That mast isn't going to bend much if at
all, and especially not because the footprint on the butt was made smaller.
All that will do is load up a smaller surface area at the back of the butt,
which is bad for the step and bad for your new mast and won't really induce
any bend.
You want to file the aft end just a bit to make the footprint a little
bigger when the mast is raked aft, to ease the load on everything where the
mast and deck are in contact. You want max headstay length so the mast is
raked aft sailing upwind-shaving the aft end a little will help increase
rake a little and spread the load on the parts when load is highest (backsay
tight, sails sheeted in, etc.)
Mike Kennedy
Pariah #146
_____
From: Derek Meyer <djmeyer16 at yahoo.com>
To: tuna at myfleet.org
Sent: Tuesday, March 10, 2009 10:53:55 PM
Subject: [Santana 22] Filing the mast butt
Hi all,
The weather is getting nice and Aquila is getting close to being sailable
again (well closer, who knew prepping a boat bottom took a dog's age?)
Since the time is getting closer, I'm preparing to put up my new mast (old
one had a HUGE bend in the middle, looks like a Frankenstein made from two
other tuna masts). However, I've discovered a discrepancy that makes me
unsure which part of the mast butt to file down:
>From the John Skinner article: "In addition, you should unstep your mast and
file the forward part of the butt of the mast (1/8 inch is plenty) to ensure
that the mast bears on the aft edge. This helps to induce bend in the mast
in heavier winds when the backstay is tightened. "
However according to the rules:
"MAST. Butt rests firmly on the deck and bears the force of the rig flat on
the deck
A maximum of 3/32" may be shaved off the aft edge of the mast butt in order
to
promote the stability of a raked mast under load (added 2003)"
So, clearly one of these is incorrect. Do I want to file down the forward
part of the mast or the aft part? Any other advice you can give me on this
is appreciated. Thanks!
-Derek Meyer
Aquila 28465
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