Inside early Nacra hulls :: Catamaran Sailboats at TheBeachcats.com

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Inside early Nacra hulls

I posted these with the idea they may help someone who has torn loose a rudder fitting, or tramp track, or some other damage, & would like to know what is inside the hull before they tear off a deck plate.

Date: 10/27/2011

Owner: Edchris177

Size: 15 items

IMG_2525

The front hull was torn off, just at the front beam. This shows the bulkhead, under the front beam. The two bolts you see at the top are the bolts that go through the front of the beam strap

Date: 10/27/2011

IMG_2547

Here is another photo showing where the front beam strap goes through. You can see the bulk head, stringer tube, & the metallic block that the beam bolt threads into.

Date: 10/27/2011

IMG_2526

Here is the same area, showing the bottom of the hull. Of note is the tube going through the bulkhead to allow for water to drain to the rear of the hull

Date: 10/27/2011

IMG_2531

This is the front 5 feet of the hull that was torn off. You can clearly see the no slip decking that goes on top of the hull, & how it is attached. Also note the stringers, going forward, across the hull, then back down the opposite side. These strin

Date: 10/27/2011

IMG_2534

Here is another shot of the upper non slip decking. You can see that it sits on a fairly large "lip". IF you need access these decks can be removed, then resin applied & glued back into place.

Date: 10/27/2011

IMG_2539

Here is a shot inside the starboard hull, looking rearwards. You can see the trunk for the dagger board. Top of photo is the top deck, where you would sit. The line of rivets on the right side is how the tramp track is attached.

Date: 10/27/2011

rivets

Here is a close up of the tramp track rivets. It is a composite of two photos, so the rivets do not line up. Notice there is no backing plate, they were simply inserted in a drilled hole & pulled. If repairing I would place an aluminum washer on each

Date: 10/27/2011

IMG_2540

Here is the same hull, looking backwards, showing the outside wall of the hull. You can see how chain plate that the shroud attaches to is glassed in with extra layers for strength. There does not seem to be a backing plate, however a small one could be b

Date: 10/27/2011

IMG_2541

A slightly different angle of the same hull, chain plate top center, & one of the tubes that serve to stiffen the deck. You can see the bulk head in the area of the rear beam. There is also a tube through the bottom for drainage.

Date: 10/27/2011

IMG_2544

Here is the transom. You can see the 4 bolts that hold the lower rudder attachment. There does not appear to be a backing plate, only washers under the nuts. The hole at the bottom is the rear hull drain plug. If you look at the very lower left you can

Date: 10/27/2011

IMG_2551

Front beam, you can see that these early model 5.2s did not utilize the 1/2 moon shaped beam chocks (bolted through the beam into the hull that prevented rotation of the beam. This older model used a tube running down the center of the tramp, riveted to t

Date: 10/27/2011