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Old 27-10-2012, 20:29   #1
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This May Sound Silly.... Mono Cat?

so i can buy two monohull 52' aluminum hulls.
and i can get them cheaper then i can build a cat.
now 52' is shorter then we had planned, but here is my idea.
i can cut half of the top of the boat's off. make a good bridge between the two. and i have my cat....
the boats are from the 50's. very cheap, and all the wood is shot. very perfect. this would get us on the water two years sooner.
whatcha think? and i am being serious.
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Old 27-10-2012, 20:47   #2
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Re: this may sound silly.... mono cat?

The boat will sail like an absolute pig, will have no resale value, you are missing huge engineering answers (how and where to support the rig for instance), and the boat will be incredibly heavy for a cat of its size.

In short, you can do it. But I think it is a really bad idea.
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Old 27-10-2012, 20:54   #3
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Re: this may sound silly.... mono cat?

Quote:
Originally Posted by scoobert View Post
so i can buy two monohull 52' aluminum hulls.
and i can get them cheaper then i can build a cat.
now 52' is shorter then we had planned, but here is my idea.
i can cut half of the top of the boat's off. make a good bridge between the two. and i have my cat....
the boats are from the 50's. very cheap, and all the wood is shot. very perfect. this would get us on the water two years sooner.
whatcha think? and i am being serious.
Are you being serious? No, I don't think you are.
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Old 27-10-2012, 21:06   #4
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Re: this may sound silly.... mono cat?

Click on his name and read since of his/ her other post s. He/ she is being serious
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Old 28-10-2012, 02:45   #5
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Re: this may sound silly.... mono cat?

You will have built a raft.

Be cheaper to use old oil drums. and likely sail better.
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Old 28-10-2012, 05:18   #6
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Re: this may sound silly.... mono cat?

Put a motor in each, fly a kite and you can still call it a sail boat.
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Old 28-10-2012, 06:01   #7
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Re: this may sound silly.... mono cat?

sorry, i wrote off sailing. well kinda.
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at less then $.93 per watt this will be the way i go.
the reason i need a cat is due to the power required to power a mono.
i am looking at 35-45hp to push a 52' mono at 4kts.
its only 15hp for a 65' cat at the same speed.
15 hp is only 11,250 watts. i was planning a 30,000-40,000 watt array.
its going to be a lot of work, but less work then assembling a kit from scratch.
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Old 28-10-2012, 06:18   #8
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Re: this may sound silly.... mono cat?

Waterworld.
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Old 28-10-2012, 06:29   #9
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Re: this may sound silly.... mono cat?

Quote:
Originally Posted by scoobert View Post
so i can buy two monohull 52' aluminum hulls.
and i can get them cheaper then i can build a cat.
now 52' is shorter then we had planned, but here is my idea.
i can cut half of the top of the boat's off. make a good bridge between the two. and i have my cat....
the boats are from the 50's. very cheap, and all the wood is shot. very perfect. this would get us on the water two years sooner.
whatcha think? and i am being serious.

Well since you are "serious" just do it and don't ask us!

I look forward to the story later
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Old 28-10-2012, 07:41   #10
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Are you talking about two displacement hulls? You won't realize the advantage you are describing if that's the case. What is the hull speed of the aluminum hulls?
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Old 28-10-2012, 07:47   #11
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Re: this may sound silly.... mono cat?

unfortunately they would be planning hulls.
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Old 28-10-2012, 08:23   #12
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Re: this may sound silly.... mono cat?

you could build it out of recycling bottles,,, save the economy
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Old 28-10-2012, 08:27   #13
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Re: this may sound silly.... mono cat?

And on a smaller scale, someone here in Vancouver came up with, and began marketing a "kit" which would convert two canoes into a "sailing catamaran." flop.
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Old 28-10-2012, 08:32   #14
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Re: this may sound silly.... mono cat?

Quote:
Originally Posted by scoobert View Post
sorry, i wrote off sailing. well kinda.
Tūranor PlanetSolar - Wikipedia, the free encyclopedia
at less then $.93 per watt this will be the way i go.
the reason i need a cat is due to the power required to power a mono.
i am looking at 35-45hp to push a 52' mono at 4kts.
its only 15hp for a 65' cat at the same speed.
15 hp is only 11,250 watts. i was planning a 30,000-40,000 watt array.
its going to be a lot of work, but less work then assembling a kit from scratch.
Quote:
Originally Posted by scoobert View Post
unfortunately they would be planning hulls.
You really need to read some books or take some classes before you start cobbling boats together.

If you bolt two fat planing hulls together as a catamaran they don't magically lose most of their drag. Catamarans require less power to move for a few reasons, one of the more important is their individual hulls have a high length to beam ratio, typically 8:1 or higher.
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Old 28-10-2012, 08:46   #15
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Re: this may sound silly.... mono cat?

Quote:
Originally Posted by cal40john
Catamarans require less power to move for a few reasons, one of the more important is their individual hulls have a high length to beam ratio, typically 8:1 or higher.
If you were to take one hull and split it down the centerline, add a flat side, then put the flat sides on the outboard. Then it would be closer to a Hobbie.
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