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Old 08-09-2013, 18:18   #16
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Re: Construction Thread for custom 45' cruising powercat

This certainly looks like a $$$ " if you have to ask" deal.

Would be interested to know elapsed time of build?
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Old 08-09-2013, 18:28   #17
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Re: Construction Thread for custom 45' cruising powercat

Quote:
Originally Posted by Boatguy30 View Post
This certainly looks like a $$$ " if you have to ask" deal.

Would be interested to know elapsed time of build?
It has been under construction for alittle over 3 years, but there has never been a very big crew on her, usually 2 to 3 people, and she was all the building wanted. With a larger building you could have built both hulls at once and prefabbed more of her ahead of time.
Then there is the added plus of having built her and knowing the ins and outs, with a larger building and a crew of 4 to 5, she would be a 2 year project.
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Old 08-09-2013, 18:32   #18
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Re: Construction Thread for custom 45' cruising powercat

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Originally Posted by belizesailor View Post
Interesting.

Est GPH at reasonable cruising RPM?

Is this a one off or do you plan additional builds?

Est cost?

Fuel burn of 3.5 gals an hour is what has been estimated at 11 knots.

She is a one off, but we have the design and would build another. The topsides could be changed, but the hulls are the hard part and their design is set.

Cost would depend on level of finish, but for one like this, with the same equipment, would run around 750K-800k.
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Old 08-09-2013, 20:09   #19
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A few pictures of her in the yard

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Old 09-09-2013, 05:28   #20
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Panels, wiring and battery compartment

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Old 09-09-2013, 05:33   #21
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Re: Construction Thread for custom 45' cruising powercat

Looks like a very nice unit. It did look like the engine compartments were kind of tight. Is there room to get around the engine for repairs, oil changes?
Thanks.
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Old 09-09-2013, 05:42   #22
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Re: Construction Thread for custom 45' cruising powercat

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Looks like a very nice unit. It did look like the engine compartments were kind of tight. Is there room to get around the engine for repairs, oil changes?
Thanks.
They are tight but there is access to the front and back of the engines and you can reach everything from there. The oil filters are remote, as is the oil pump out line.

With a beam to length ratio of 13 to 1, it gets kinda narrow in the hulls, but that is what makes her perform.
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Old 09-09-2013, 05:47   #23
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Re: Construction Thread for custom 45' cruising powercat

Thanks for your comeback.
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Old 09-09-2013, 06:42   #24
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Re: Construction Thread for custom 45' cruising powercat

I've seen a number of these hull designs with a significant 'step' in them above the waterline. While this increases efficiency, my understanding is that it creates significant slapping on the hulls in anything but calm waters.
As sleeping quarters are right next to this slap area, it can be disturbing.

Thanks for sharing. I agree building a second one is always a LOT faster to build.
3 years is pretty quick for such a big boat. Is this your boat, or for a customer?
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Old 09-09-2013, 09:03   #25
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Re: Construction Thread for custom 45' cruising powercat

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Originally Posted by nimblemotors View Post
I've seen a number of these hull designs with a significant 'step' in them above the waterline. While this increases efficiency, my understanding is that it creates significant slapping on the hulls in anything but calm waters.
As sleeping quarters are right next to this slap area, it can be disturbing.

Thanks for sharing. I agree building a second one is always a LOT faster to build.
3 years is pretty quick for such a big boat. Is this your boat, or for a customer?
It is for a customer.
If you notice, the transition to the side is curved for a soft transition without a flat for the water to slap on.
It's purpose is to put more room in the hulls above the waterline.

With that and the core construction I don't believe that noise from the water will be much of an issue.
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Old 09-09-2013, 12:30   #26
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A few more pictures. Interior construction

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Old 09-09-2013, 12:40   #27
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Fuel,water and holding tanks.

Here are pictures of the built in fuel and water tanks and the built in holding tank. They are built with glass and epoxy and the fuel and water tanks have cleanout hatches with gaskets.



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Old 09-09-2013, 18:03   #28
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interior pictures

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Old 10-09-2013, 18:46   #29
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Few More Pics

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Old 11-09-2013, 15:43   #30
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Re: Construction Thread for custom 45' cruising powercat

Today I have been building the fuel distribution panels.

First is a two way valve to chose fuel run or prime. The prime line goes to an electric fuel pump.
Both the run line and prime line join going into an RCI filterless fuel purifier before going to a groco valve that will allow the choice of #1 racor 500, #2 racor 500, both or off.
After that to the flow scan sensor and the engine.
I should have pictures tomorrow.
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