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
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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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