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Old 07-11-2019, 18:44   #76
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pirate Re: I watched a guy nearly capsize right in front of us

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TW is correct.
Wharrams I've sailed are two single, stand alone hulls which are lashed together with cross-members and webbing straps - unlike any other cat I've been on.
No.. They do not stand alone.. they fall over.
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Old 07-11-2019, 19:06   #77
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Re: I watched a guy nearly capsize right in front of us

Especially after a lot of rum!
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Old 10-11-2019, 21:13   #78
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Re: I watched a guy nearly capsize right in front of us

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No itís not!
I've told you before
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Old 11-11-2019, 06:05   #79
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Re: I watched a guy nearly capsize right in front of us

You did not!
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Old 06-12-2019, 18:41   #80
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Re: I watched a guy nearly capsize right in front of us

https://www.wharram.com/articles/how...aran-stability

Didn't find the Cooltubes device, but found this from James Wharram.

Interesting discussion on Catamaran stability.
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Old 06-12-2019, 19:12   #81
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Re: I watched a guy nearly capsize right in front of us

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Didn't find the Cooltubes device
It was basically a custom one-off device that was then patented, but due to a combination of circumstances never went into production.


The patent has since expired.. you can find some details of it here.. https://patents.google.com/patent/US4541356


Further details/drawings are probably available from the US Patent Office for a fee.
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Old 07-12-2019, 04:34   #82
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Re: I watched a guy nearly capsize right in front of us

All of this catamaran discussion is a smoke screen that misses the real point. The question is not whether or not the catamaran can be knocked down. The question should be whether or not a catamaran will right itself like a well designed and sealed mono hull will. Now, apply your high school physics to find the answer.
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Old 07-12-2019, 06:58   #83
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Re: I watched a guy nearly capsize right in front of us

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All of this catamaran discussion is a smoke screen that misses the real point. The question is not whether or not the catamaran can be knocked down. The question should be whether or not a catamaran will right itself like a well designed and sealed mono hull will. Now, apply your high school physics to find the answer.
Dude, I have an advanced degree in Physics, and Theoretical Mathematics, I make a living solving equations for engineers, don't go there.

Form stability is the future, IF you had read the whitepaper you would have seen why.

You have a righting arm of what? 7ft? I have a righting arm of 24ft with a 10,000 lb AMA on the end of it. (with probably another 2,000 lbs of my junk). A monohull will roll a hundred times before a cat rolls once.

There are dozens of threads on this forum generally turning into flame wars on this subject. I'm sure your boat does a fine job for its intended purpose, I thought long, and hard looking at hundreds of monohulls before I made my decision.

You can if you like start a thread on monohull stability, or you can revive one of the flame war threads. But your statement has no purpose here.
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Old 16-12-2019, 17:43   #84
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Re: I watched a guy nearly capsize right in front of us

While you spend the next few years figuring that out, I think Ill sail a few thousand more miles in a catamaran. Ill get back to you!
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Dude, I have an advanced degree in Physics, and Theoretical Mathematics, I make a living solving equations for engineers, don't go there.

Form stability is the future, IF you had read the whitepaper you would have seen why.

You have a righting arm of what? 7ft? I have a righting arm of 24ft with a 10,000 lb AMA on the end of it. (with probably another 2,000 lbs of my junk). A monohull will roll a hundred times before a cat rolls once.

There are dozens of threads on this forum generally turning into flame wars on this subject. I'm sure your boat does a fine job for its intended purpose, I thought long, and hard looking at hundreds of monohulls before I made my decision.

You can if you like start a thread on monohull stability, or you can revive one of the flame war threads. But your statement has no purpose here.
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Old 17-12-2019, 04:24   #85
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Re: I watched a guy nearly capsize right in front of us

Wharramís arenít lashes together they are lashed apart.
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Old 17-12-2019, 19:29   #86
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Re: I watched a guy nearly capsize right in front of us

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Dude, I have an advanced degree in Physics, and Theoretical Mathematics, I make a living solving equations for engineers, don't go there.

Form stability is the future, IF you had read the whitepaper you would have seen why.

You have a righting arm of what? 7ft? I have a righting arm of 24ft with a 10,000 lb AMA on the end of it. (with probably another 2,000 lbs of my junk). A monohull will roll a hundred times before a cat rolls once.

There are dozens of threads on this forum generally turning into flame wars on this subject. I'm sure your boat does a fine job for its intended purpose, I thought long, and hard looking at hundreds of monohulls before I made my decision.

You can if you like start a thread on monohull stability, or you can revive one of the flame war threads. But your statement has no purpose here.
With all your qualifications you still did not answer his physics question.
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Old 18-12-2019, 02:04   #87
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Re: I watched a guy nearly capsize right in front of us

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Originally Posted by conchaway View Post
All of this catamaran discussion is a smoke screen that misses the real point. The question is not whether or not the catamaran can be knocked down. The question should be whether or not a catamaran will right itself like a well designed and sealed mono hull will. Now, apply your high school physics to find the answer.
A monohull rolls through 360 degrees, it's rig is torn off.

Because it's rig is gone, it will now continue to roll repeatedly, smashing everything and everyone on board, resulting in the engine, steering and crew being disabled.

What is left is a seriously injured crew in a completely disabled boat, at real risk of sinking.

Is this in any way advantageous compared to a catamaran that inverts and remains afloat upside down?

Add to that the fact that the conditions which rolled your mono many times over may not have been sufficiently severe to even capsize a catamaran in the first place.

Then there's all those keels falling off all over the place. Very untidy.
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Old 18-12-2019, 03:51   #88
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Re: I watched a guy nearly capsize right in front of us

When are you people going to get it through your heads that there are great Cats and there are crap Cats there are great mono's and there are crap mono's. What is far more important is your ability as a sailor. Any boat crossing oceans can be a death trap in the hands of a poor sailor with poor seamanship and good sailors using good seamanship can safely cross oceans in just about anything. Your constant rambles that one is any better than the other does not reflect well on your knowledge of boat design or seamanship so my assumption is that you are all dangerous in either.
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Old 19-12-2019, 02:41   #89
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Re: I watched a guy nearly capsize right in front of us

Yeah, I can imagine the masts and keels coming off of some of these Tupperware boats
And I suppose serious Southern ocean sailors like Skip Novak need to move to a Tupperware raft first designed to carry the women children and pigs from one island the other. Hehe LOL
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Old 20-12-2019, 02:03   #90
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Re: I watched a guy nearly capsize right in front of us

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Yeah, I can imagine the masts and keels coming off of some of these Tupperware boats
And I suppose serious Southern ocean sailors like Skip Novak need to move to a Tupperware raft first designed to carry the women children and pigs from one island the other. Hehe LOL
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