Balsa core in deck?

Brian26x · Post by **Brian26x** » Wed Jul 11, 2007 10:33 am

I just resealed the dodger harware installed on the deck. I found some areas to have the balsa core, and some to be soild fibre glass. This got me thinking, does anyone know where the balsa cored areas are located in the deck? I was tapping around on the deck to check for any delamination, and now I'm not sure if it's a solid area or some delamination.
Brian.

vkmaynard · Post by **vkmaynard** » Wed Jul 11, 2007 10:45 am

What year is your 26X?

I think in 2000 they removed all balsa cores in the deck except the forward hatch.

Victor

mikelinmon · Post by **mikelinmon** » Wed Jul 18, 2007 3:15 pm

Hi,

Balsa is everywhere on the deck except: Any MacGregor installed hardware ( all of that is solid glass pads of mat/roving layers ). The vertical surfaces, Adjacent to the window edges, The pedestal base (hard plywood used here). If installing hardware do it very close to MacGregor installed hardware using his own pads. I just redesign the Mac hardware base to include my own needs. Lifeline posts are a good example. Remove the post and weld your new part to the base and bolt back on. The MacGregor pads are very strong! No reinforcements needed. But, like any boat, do not mount hardware to balsa cored areas.
MIke Inmon

vkmaynard · Post by **vkmaynard** » Wed Jul 18, 2007 3:28 pm

What year is your boat?

Divecoz · Post by **Divecoz** » Wed Jul 18, 2007 6:50 pm

mikelinmon wrote:Hi,

Balsa is everywhere on the deck except: Any MacGregor installed hardware ( all of that is solid glass pads of mat/roving layers ). The vertical surfaces, Adjacent to the window edges, The pedestal base (hard plywood used here). If installing hardware do it very close to MacGregor installed hardware using his own pads. I just redesign the Mac hardware base to include my own needs. Lifeline posts are a good example. Remove the post and weld your new part to the base and bolt back on. The MacGregor pads are very strong! No reinforcements needed. But, like any boat, do not mount hardware to balsa cored areas.
MIke Inmon

Am I to read that to say even the M generation has balsa panels?

ALX357 · Post by **ALX357** » Wed Jul 18, 2007 7:45 pm

My understanding is the newer version X ( 1999 and later) boat omitted the balsa core, except in the front hatch and slider hatch. Instead they have a rib-type reinforcement as in the pictures of my 2000 X here, with the foam being used to hold the ribs' roving in place while the layup cures.

Frank C · Post by **Frank C** » Wed Jul 18, 2007 7:57 pm

Mike has maybe forgotten about the following page that appeared
on Roger's website in November, 1999 (here's one related thread).

This is from the MacGregor website - dated November 20, 1999

NEW DECK STRUCTURE. For quite a few months, we have been building decks with an entirely new layup system. Much of the balsa wood has been replaced with a system of molded beams that make the deck liner a functional part of the deck structure.

Many owners of '99 boats have reported this factory change was implemented. My 2000 is definitely a foam sandwich model. Pull a couple of the plastic liner plugs under the jib tracks. You can look inside with a flashlight to determine the sandwich structure in your particular boat.

The only wood I've found in my hull is in the fore-hatch (balsa) and the transom (plywood).

Post by **kmclemore** » Wed Jul 18, 2007 8:34 pm

My '98 also has the foam core in the deck... found it when I installed my Nicro vent.

DLT · Post by **DLT** » Wed Jul 18, 2007 9:10 pm

I dont have Mike's access to Roger, so I'll defer to him. But, I would be shocked if my 2005 M had balsa-core anywhere...

Yes, I KNOW I have plywood in the cockpit sole and the pedestal base (with the SST tube therebetween). But, it looks to me that the rest of the "built up" parts are F/G mat, not balsa(such as the V-berth hatch and the companionway sliding hatch)...

I also KNOW that I have the foam/rib structure in some places (such as the space under the deck, starboard of the dagger board trunk)...

Harrison · Post by **Harrison** » Thu Jul 19, 2007 9:02 am

DLT, my 2005 has balsa in the v-birth hatch. Noticed it when adding my Nicro vent. Looks just like the pic that ALX357 posted.

---Harrison

DLT · Post by **DLT** » Thu Jul 19, 2007 9:51 am

Ok, I'm shocked!

Brian26x · Post by **Brian26x** » Tue Jul 24, 2007 9:54 am

Sorry, I've been on holidays, sailing that is. My 26x is a 1996.

mikelinmon · Post by **mikelinmon** » Thu Jul 26, 2007 12:05 pm

Hi,
Yes the balsa was mostly removed in late 99, but as you can see the question was about the gent's 96 X. The only balsa now used is the fwd hatch and the sliding hatch.
Mike Inmon

ALX357 · Post by **ALX357** » Thu Jul 26, 2007 4:58 pm

Whenever you drill thru a deck and find wood, the procedure is to gouge out the wood around the hole until you can fill the area solid with resin, and then drill thru the resin, keeping the wood hermetically sealed away from any water that could "ever" pass down thr the hole along the bolt/screw etc.

Brian26x · Post by **Brian26x** » Sat Jul 28, 2007 6:55 pm

When I reinstalled the dodger hardware I did drill larger holes, fill them with a mix of epoxy and high density filler, then drill proper size holes. How about the factory installed stuff? Was it done right? Do I need to remove it to check, and reseal? Or are they installed in solid glass areas? If anyone has done this already it would save me a lot of work.

MacGregorSailors.com

MacGregorSailors.com

Balsa core in deck?

Balsa core in deck?

What year is your 26X?

Where ias the balsa?

Re: Where ias the balsa?