Bonito's mast base is stock / unaltered / flat. It sits on a cast
aluminum male plug so, any uneven distribution of weight is transferred
through the plug's plate to the deck beneath it and not directly to a
smaller point of the deck. The mast both bends aft upwind and rocks
forward down, when the backstay is on with up to 900 pounds of pull and
eased off as far as the purchase system permits alternately. I think it
unnecessary to alter the mast base.
Bonito's forestay is short of maximum, I believe by about the inch and a
half Jan recalls but, I honestly don't exactly. Anyway, her helm is
fairly neutral. More rake would hurt our down wind speed in my opinion,
which is our weaker point of sail, again in my opinion, so, I am pretty
satisfied with the current balance of things.
Michael Andrews
811 Bonito
________________________________
From: tuna-bounces at myfleet.org [mailto:tuna-bounces at myfleet.org] On
Behalf Of Jan Grygier
Sent: Wednesday, March 11, 2009 8:46 AM
To: tuna at myfleet.org
Subject: Re: [Santana 22] Filing the mast butt
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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