[Public-List] Mast Rake

[via Public-List]

John
Your observation fits with what Jason discovered when he found the
same problem I have. He drew the same conclusion as you did about the
pressure that is put on the part of the mast stay not supported by the
aluminium beam.
It occurs to me that, with the mast step area exposed, one way to
solve the problem would be to move the mast step forward so that the
mast is over the middle of the beam. Of course that would lead to
rebuilding the hatch area and probably getting a new modern hatch as
well as getting a longer back stay. Assuming that one made sure the
wood on top of the beam was ok or fixed and the leaks under the mast
step were fixed, one might have a very permanent fix.
so in the spirit of science where one seeks to challenge one's
hypothesis as part of making one's claim about the how the natural
world works, what's wrong with this solution - aside from its
potential monstrous cost? I am assuming that this will be costly
enough anyway.
Your thoughts and those of the rest of the community as well?
David, 432

	-----------------------------------------From: "John Birch via
Public-List" 

To: "Alberg 30 Public List -- open to all"
Cc: 
Sent: Sun, 14 Feb 2016 10:01:52 -0500
Subject: Re: [Public-List] Mast Rake

 90 degrees to the water. Hang the loose main halyard down, sometimes
a light 
 weight is required to get it to act like a plumb bob. It should not
be 
 hanging aft of the mast. If it is, that is rake. The more it hangs
aft of 
 the mast, the more rake. The more rake, the more load being put on
the aft 
 part of the mast step which is not particularly well supported as it
is not 
 over the mast beam.

 Cheers,

 JB

 Re:

 I remember our A-30 had this problem (KC-544) until we started tuning
our 
 rig like the Chesapeake racers. Mast vertical, no rake, or virtually
no 
 rake. That took the loading off the deck at the back of the mast
foot, which 
 is not supported particularly well by the Aluminium deck beam,
putting most 
 of the downward force under the front of the mast step directly over
the 
 deck beam.

 Problem solved. Our decks were dry with no delam. It was a simple 
 compression issue on the back of the step.

 Hope that is a help.

 Cheers from Western Lake Ontario, y'all

 JB

 ----- Original Message ----- 
 From: "Anders Bro via Public-List" 
 To: "Greg Bover" ; "Alberg 30 Public List -- open to 
 all" 
 Sent: Sunday, February 14, 2016 8:46 AM
 Subject: Re: [Public-List] Mast Rake

 > Now why didn't I think of that? (I guess I just don't think?)
 > Thanks,
 > Anders
 >
 > Sent from my iPhone
 >
 >> On Feb 14, 2016, at 8:31 AM, Greg Bover via Public-List 
 >>  wrote:
 >>
 >> Use your main halyard as a plumb bob.
 >>
 >>> I was wondering if someone would clarify for me what "vertical"
means on 
 >>> a
 >> sailboat which doesn't have any reference lines (except perhaps
the vague
 >> plane of the waterline). If you are setting the mast rake wrt the 
 >> waterline,
 >> how do you assess this angle (since it is difficult to see the
waterline
 >> from the deck where a person is making the adjustments). Maybe
Instead 
 >> you
 >> establish this angle wrt the lowers? (splitting the angle?) Or
maybe on a
 >> calm day afar with a level while the boat is afloat? Or maybe just
trial 
 >> and
 >> error???
 >>
 >>
 >>
 >>
 >>
 >> Greg Bover
 >> A-30 #114
 >> PENSIVE FLYER
 >> Gloucester
 >>
 >>
 >>
 >>
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