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The new compmillennia 39 cat

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Old 06-11-2015, 03:54 PM
  #221  
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Originally Posted by JoseG View Post
How is the gelcoat applied for boats to come out of the mold already gelcoated? is it sprayed on the mold before laying the fiber glass?
Yes that is correct.

There are two classes of gel coat. Exterior and Interior.

The exterior is used in a mold first. It has what is called an air inhibited cure, Gelcoat iis 35-50% styrene, When the mold is coated, the styrene on the surface evaporates and is not available to link with the rest of the resin in the gel coat so the surface cure is inhibited.
Adding a laminating resin on top of the gel coat replaces the styrene and you get a chemical bond between laminating resin to gel coat.

Interior gelcoat has a wax additive which floats to the surface, prevents the evaporation, and allows the gelcoat to cure completely. This is the gel coat used as a coating, such as in the bilges.

Exterior gel coat can be used outside of a mold by mixing in a wax additive yourself that comes to the surface and seals the gel coat from the air.
You can also spray a coating of PVA (poly vinyl alcohol), which is a thin liquid mold release and it makes a film that does the same thing as the wax.

You don't want to get the two confused. :-)

Last edited by Otseg; 06-12-2015 at 02:14 PM.
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Old 06-12-2015, 11:44 AM
  #222  
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Its that 12' wide boat deck through a 10' wide door. In one of our 100 year old buildings I can't fail to believe that the original builder never contemplated 12' beam composite catamarans fabricated inside. Anything is possible. That 19' wide carbon fiber cabin top came out of the same door also.
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Old 06-12-2015, 02:00 PM
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Originally Posted by Otseg View Post
Yes that is correct.

There are two classes of gel coat. Exterior and Interior.

The exterior is used in a mold first. It has what is called an air inhibited cure, Gelcoat iis 35-50% styrene, When the mold is coated, the styrene on the surface evaporates and is not available to link with the rest of the resin in the gel coat so the surface cure is inhibited.
Adding a laminating resin on top of the gel coat replaces the styrene and you get a chemical bond between laminating resin to gel coat.

Interior gelcoat has a wax additive which floats to the surface, prevents the evaporation, and allows the gelcoat to cure completely. This is the gel coat used as a coating, such as in the bilges.

Exterior gel coat can be used outside of a mold by mixing in a wax addative that comes to the surface and seals the gel coat from the air.

You don't want to get the two confused. :-)
Very interesting. Thanks
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Old 06-18-2015, 11:21 AM
  #224  
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Default Sneak Peek

Sneak..........Peek.
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Old 06-18-2015, 07:57 PM
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looking good
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Old 06-18-2015, 08:34 PM
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Interesting build concept
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Old 06-19-2015, 04:39 AM
  #227  
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Design and materials leapfrog each other. New materials stimulate design, and the demands of new designs give rise to investment in new materials. And then there is the Internet. My friend Brownie told me 20 years ago that the boat business will be just like the car business in the future. A few "majors" building the majority of the boats, but still a place with the limited production specialists.

I felt there was a huge amount of low hanging fruit in this market segment, and with the collaboration with Ray, the opportunity to collect it.

My new best friend is our calibrated digital scale. Its good for 1 Ton, or 2200 lbs.
As parts are completed and are compared to the weight study, we are equal or less.
The scale is weighing a 39' part. We expect to be about 500 lbs lighter than Reggie's 42' 177 mph Kilo record holder. That means if we put 1200 hp in each hull instead of the 350 Verado's, and up the size of the T-Top legs, 180 mph should be no problem!
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Old 06-19-2015, 10:56 AM
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Originally Posted by Otseg View Post
Design and materials leapfrog each other. New materials stimulate design, and the demands of new designs give rise to investment in new materials. And then there is the Internet. My friend Brownie told me 20 years ago that the boat business will be just like the car business in the future. A few "majors" building the majority of the boats, but still a place with the limited production specialists.

I felt there was a huge amount of low hanging fruit in this market segment, and with the collaboration with Ray, the opportunity to collect it.

My new best friend is our calibrated digital scale. Its good for 1 Ton, or 2200 lbs.
As parts are completed and are compared to the weight study, we are equal or less.
The scale is weighing a 39' part. We expect to be about 500 lbs lighter than Reggie's 42' 177 mph Kilo record holder. That means if we put 1200 hp in each hull instead of the 350 Verado's, and up the size of the T-Top legs, 180 mph should be no problem!
Better put wings on it. You get going that fast and you will fly with a cat! I wanna watch from the shore.
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Old 06-19-2015, 11:40 AM
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I just answered a question from a client in Miami. He runs hard and his aging 39' V bottom on its 4th set of engines is due for replacement.

QUESTION;
Looks good, but are you building this too light??? If you hit something in the water is the hull going to puncture???

ANSWER:

No puncturing.

We partnered with a composite fabric manufacture to build panels with our laminate for testing. The project required the boats to run up a rocky beach at speed and the crew to jump out, carry it, and hide it in the bushes. 50 samples, 2' x 2' panel bolted to a frame and a 15 kg open ended pipe dropped from 12 meters. We were able to make some laminate that only scuffed. That's what we use in the bottom. It really is all about the resin system. With the vacuum infusion process we use less of the $4 to $6 /lb super resin than others who use more of the generic $1.50-$2.50 / lb resin.

As an example, One of my Egret 18's was being trailered, and had a panic stop for an accident below the bridge at Islamorada. Another truck towing a 30' Grady White came over the bridge at speed and slammed into the back of the 1800 lb Egret. It Broke the 175 Mercury engine in half, It broke the trailer into three pieces, it propelled the boat over top of the tow vehicle and 100 feet down the road with the winch stand hanging from the bow eye. We charged $1100 to repair a 6" gouge in the outer skin where the winch caught it, and the gravel rash on the bottom from sliding down the road. Nothing else damaged.

There are very few things in the Pamlico River, I personally have not run over with my silver cat which you have ridden, including a civil war ironside.

Aside from 4 essentially water tight bulkheads in each hull, the buoyancy of the core in the wing deck would support the weight of (4) 350 Verados, two guys and a full cooler. Ray made the decision not to have me provide for a life raft because we are building one.

Not to worry, run over whatever you want.
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Old 06-19-2015, 08:28 PM
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Can you please pm me a contact number?
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Old 06-19-2015, 09:15 PM
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.
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Old 06-20-2015, 08:25 AM
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Impressive stuff Jim. Between the tank design, the fabric/core material choices, and the projected speed/economy w/ twins, this will be a trend I hope other builders follow.
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Old 06-21-2015, 01:04 PM
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Whats the lamination schedule for these test panels?
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Old 06-21-2015, 06:33 PM
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Originally Posted by JohnnyBeGood View Post
Whats the lamination schedule for these test panels?
I made the panels with the fabrics provided to me plus some made with our shop inventory material I slipped in. The constant was that we added plys until we were as close to a constant Grams Sq/Meter baseline. The panels finished between 4 to 6 mm thick. Different fibers can be of the same weave but different densities so stacked up the thickness varies.

As a career path Boat Building seemed more like fun. I quickly realized that my testing partners had better looking employees than mine.
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Old 07-07-2015, 12:41 PM
  #235  
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any updates???
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Old 07-07-2015, 02:43 PM
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Just got back from my vacation week in Michigan. My wife will be staying for the month with the children at my Mothers lake cabin. Before I left my wife said "eat apples, lose some weight, and stay out of trouble". I was pretty lean before her home cooked meals, so I can't see that 10 lbs. is my fault, and when she phones the shop number day or night and I answer, I'm good.

That being said; The 27 is out the door, all of the boat builders are refreshed from the 4th of July holiday break, the shiny bits are being delivered, Ray makes decisions instantaneously as needed and we are motivated to wrap this boat up.

The below deck compartments are getting finished out and we have the side decks, bait wells fish boxes and aft cockpit bhds in process. The electrical plan, or distribution to the sparky bits as I call them, is getting wrapped up for Ray's approval and I expect motors and electronics to arrive timely.
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Old 07-09-2015, 04:42 PM
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Default Carbon fiber casting deck - fwd crash bhd

Carbon fiber casting deck - fwd crash bhd combination getting a final fit.

Either the worlds largest T-Top floating above the hull or the cockpit sole waiting for the fuel tanks and fish boxes to be fit.
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Old 07-16-2015, 12:48 PM
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A Grander is a "Big Fish", so I guess a fish box more than a thousand quarts is a "Big Fish" box. The FRP box is foamed in while still on the mold like a Boston Whaler. we will de-mold tomorrow after an overnight cure and cool down. I assure you this is a "no wood" boat The foam insulation thickness is a minimum 4 1/2" to 5 " . We varied the density from higher under the box where the loads and impact are greatest to less density towards the top of the box. Its about durability first, with weight savings always in mind.
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Old 07-16-2015, 01:25 PM
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Originally Posted by Otseg View Post
A Grander is a "Big Fish", so I guess a fish box more than a thousand quarts is a "Big Fish" box. The FRP box is foamed in while still on the mold like a Boston Whaler. we will de-mold tomorrow after an overnight cure and cool down. I assure you this is a "no wood" boat The foam insulation thickness is a minimum 4 1/2" to 5 " . We varied the density from higher under the box where the loads and impact are greatest to less density towards the top of the box. Its about durability first, with weight savings always in mind.
Now that's how you insulate a fish box. Just don't forget to do the same with the lid
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Old 07-17-2015, 07:47 AM
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You could make a curved custom fit CF ice shovel that mounts under the lid
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