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Author Topic: Stringer idea for 19' 1" project- thoughts?  (Read 1516 times)

May 12, 2006, 09:51:15 PM
Read 1516 times

Tim/GA

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Stringer idea for 19' 1" project- thoughts?
« on: May 12, 2006, 09:51:15 PM »
Ok, finally getting closer to the point of putting things back IN the boat rather than cutting and grinding things to take OUT of the boat!

As you can see in the pic, I will be starting with the center stringers.


I originally was thinking of just going with wood encapsulated stringers since I have dealt with those before, but have decided to stick to what the manuf. had in there, glass over foam.  That decided- I plan to build forms to lay the glass on in about 6ft sections.  Those will be trimmed to fit the hull (boat is a 12 degree deadrise).  

I am going to first lay a layer of stitched biaxial over the inner hull and outer stringers, then the plan was to tab in the formed stringers, cut access holes and attempt to pour the foam to fill the stringers.  Two problems I saw here- one was filling with no voids but without undue pressure build up and second was that I would really like to put have something that will give more mechanical holding power in the top of the stringer.

I am now looking at a different order to the install.  I will form the stringers on the forms and trim to fit.  Then I will be able to turn the stringers over and glass wood or stainless to the inside top of the stringers where I need more holding power.  Next step, fill the stringers with foam.  This will let me not only tab the stringers from the outside but also to use chopped mat under the stringers to also bond to the hull.

Long explanation, hope it makes sense and always looking for suggestions or problems you all see with this.  One other thing, what about drain tubes through the stringers?
Currie Custom Cast Nets and Seines
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May 13, 2006, 12:07:14 AM
Reply #1

LilRichard

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« Reply #1 on: May 13, 2006, 12:07:14 AM »
Have you checked out this dude's rebuild:

http://classicmako.com/projects/ayala/ayala11.htm

Good stuff, no?

May 15, 2006, 07:27:07 PM
Reply #2

JimCt

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« Reply #2 on: May 15, 2006, 07:27:07 PM »
Duplicate what Wilson did and you'll have a good strong structure in there.
JimCT
------
\'74 22-2 inboard
HIN:ASPL0953M74J
Chrysler 318
------
\'74 Marshall 22

May 15, 2006, 08:21:08 PM
Reply #3

Tim/GA

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« Reply #3 on: May 15, 2006, 08:21:08 PM »
That was the set of pics that got me thinking about foaming the stringers prior to glassing into the boat.  By foaming first I will not have to cut the tops to pour in the foam.  The shots a couple of pages later show why as the top portion of the stringer did not get foamed (at least at that point).  By foaming first I can make sure they are full with no voids AND will be able to lay mat over the foam prior to glassing into the hull.

Since the stringers in my boat have a taper (sort of a trapezoid shape in cross section) my form will also have the taper.
Currie Custom Cast Nets and Seines
http]

May 16, 2006, 08:18:11 AM
Reply #4

JimCt

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« Reply #4 on: May 16, 2006, 08:18:11 AM »
Sounds like a good plan for the foaming.  There are places on my 240 where the foam comes up only halfway to the top.  The more I work on my boat the more I'm convinced it was a Friday afternoon end-of-shift job.
JimCT
------
\'74 22-2 inboard
HIN:ASPL0953M74J
Chrysler 318
------
\'74 Marshall 22

May 16, 2006, 07:21:46 PM
Reply #5

Tim/GA

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« Reply #5 on: May 16, 2006, 07:21:46 PM »
Sometimes makes you wonder how they lasted so long!  But then that shows how tough the hulls on these things are.  I have no idea how long mine was running around with the two main stringers basically cut out in the mid-hull area (before I got her of course).  I look forward to the day she is rock solid and ready to go.  Going to be awhile still though!

I am a teacher so we are about done for the year.  I will have a few training/conferences to attend on the road during the summer but I will finally have some TIME to put into the boat.
Currie Custom Cast Nets and Seines
http]

May 17, 2006, 08:29:31 AM
Reply #6

JimCt

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« Reply #6 on: May 17, 2006, 08:29:31 AM »
I bet there are lots of old AS's being happily enjoyed with detached water-soaked stringers and bad decks.  Look at some of the transoms out there which are basically compost.  Anybody ever hear of a motor dropping off?  These boats are very, very forgiving.
JimCT
------
\'74 22-2 inboard
HIN:ASPL0953M74J
Chrysler 318
------
\'74 Marshall 22

 


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