Dennis,

 

Instead of lengthening the forestay, can you move the butt of the mast
forward any?  I think a ½” of movement at the base of the mast should give
you at least 5” at the masthead.

 

Jake

 

 

Jake Brodersen

C&C 35 Mk-III

"Midnight Mistress

Hampton VA

 

 

 

From: cnc-list-boun...@cnc-list.com [mailto:cnc-list-boun...@cnc-list.com]
On Behalf Of Dennis C.
Sent: Friday, September 07, 2012 6:14 PM
To: Cn Clist
Subject: Stus-List Mast rake adjustment

 

OK, check my math and thinking on this one.  

 

I want to increase the rake in Touche's mast.  I made some changes in the
rig a few months ago which brought the masthead forward so the plumb from
the masthead is only about 6 inches aft of the gooseneck.  It used to be
9-10 inches to get 1 degree of rake.

 

The foretriangle is close to a right triangle.  I=44' and J = 14.5'.  If I
add the 6 inches to J (for the plumb drop from the masthead), I get a right
triangle with sides of 44.0 and 15.0 and a hypotenuse of 46.487 (the
forestay).  

 

So, if I want to move the masthead aft another 6 inches, I end up with a
triangle of 44.0, 15.5 and 46.650.  The difference in the lengths of the
hypotenuses (hypoteni?) is 0.163 or about 2 inches.  By my thinking, I need
a new forestay about 2 inches longer than the existing one.

 

There's more to the story than this, like it's really 5 inches each for the
plumb and rake increase and I'm removing an extra toggle from the top but
the math and method should be right.

 

Am I right?

 

Dennis C.

Touche' 35-1 #83

Mandeville, LA

 

 

 

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