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Showing results 1 to 25 of 80
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Search: Posts Made By: MikeJohns
Forum: Multihull 03-19-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

I'm sorry this is tardy. I'm in the process of retiring and moving and my world is in as much disarray as the inverted cats :-)

I cannot post copyright material unfortunately but I can provide...
Forum: Multihull 03-17-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

That's precisely the type of observation I'm referring to.

Half way down that web page there is a graph that you are presumably based your statement on.

It compares a 35 foot multihull with a...
Forum: Multihull 03-17-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

I'm presuming that if you anchor a 32' cat for storm conditions it's going to be a sheltered anchorage. :)
Forum: Multihull 03-17-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

No distaste. But soon as conditions deteriorate a sailing Cat is only as safe as the on watch skipper and needs a lot of care. It's important to understand why. Extraordinary caution is required for...
Forum: Multihull 03-16-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

I'd still like to know where you got the statistics you posted earlier about sinking and inversion. And how meaningful they really were if you separated out the types of craft specifically of...
Forum: Multihull 03-15-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

What size boats were considered, in what geographical area, and who published this data ?

Looking on the internet I see a few similar claims on various sites but no reference to where it...
Forum: Multihull 03-14-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

If you build a cat and a mono without floatation of the same material then cats have a higher chance of sinking by any assessment, as they have two hulls. A breach in either hull will sink a cat if...
Forum: Multihull 03-14-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

Pitchpoling and inversion occur in heavy weather, they are not common but common enough to start to show some disturbing trends. We should look at why they are not common. For example itís not common...
Forum: Multihull 03-14-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

It's correct to say that the boats weight is equal to it's displacement.

Displacement can be taken as either the volume or the weight of the water the hull displaces. The weight of the water...
Forum: Multihull 03-14-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

So far the only decent survival strategy for a cat caught in dangerous seas is to lie to a drogue ( sea anchor) streamed on a bridle from the bows until the seas abate. That's because the diagonal...
Forum: Multihull 03-13-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

I'm afraid you have incorrect information about the QB storm. Haven't you posted this before on another site and been corrected and given references?

Every catamaran in the survival area was...
Forum: Multihull 03-12-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

We find the best juggle of compromises for our cruising style. It's all about compromise but it's good to know what you are compromising and why. Shallow draft is a big plus in the Pacific that...
Forum: Multihull 03-12-2014
Replies: 301
Views: 19,223
Posted By MikeJohns
Re: How do you feel about catamarans?

All boats are fun in the right time and place:)

I crewed on a well setup 50 foot Crowther to and around parts of NZ.

In retrospect it really wasnít a great high latitude passage vessel, we...
Forum: Seamanship & Navigation 03-11-2014
Replies: 12
Views: 1,935
Posted By MikeJohns
Re: Google Earth?

Yes if the pics are good you can tell a lot looking at a combination of chart and the aerial view. There's a tremendous amount of very useful info you can see in the aerial pics.

I set the Cache...
Forum: Boat Review and Purchase Forum 03-11-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

And the only two remaining composite clippers.

The structure is all metal, the keelsons and all framing in both ships are metal and that's why they survived even as hulks. Even recent fires :)
...
Forum: Boat Review and Purchase Forum 03-10-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

Yep it's hard stuff. Various dense Eucalypt species ( gum) were and still are used for boat building and marine structures here. It's heavy stuff and very dense.

Steel hulls are lighter than...
Forum: Boat Review and Purchase Forum 03-01-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

It's not common, the majority of steel boats struck get no extra deviation and when they do it's temporary. But it is something you need to be aware of.

I've seen up to 35 degrees extra deviation...
Forum: Boat Review and Purchase Forum 02-23-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

The keels are braced and the boat is on skids and I'm guessing it's not been ballasted since it's towing so easily. So it's bashing it's way through 100 yards of grass :)

I've seen larger steel...
Forum: Boat Review and Purchase Forum 02-23-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

Nothing significantly changed to the interior detail after it was finished. All those welds needed grinding back and re-welding without stress risers, and the brackets and transverse termination...
Forum: Boat Review and Purchase Forum 02-22-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

Care and craftsmanship and Brent are not bedfellows. For Brent to comment on aesthetics is a joke.

When you look closely at Brent's boat building you quickly see he's not at all interested in...
Forum: Boat Review and Purchase Forum 02-21-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

There are a dozen experienced yacht designers/naval architects/engineers several pro boatbuilders experienced in steel and numerous amateurs including coded welders with more knowledge than you, who...
Forum: Boat Review and Purchase Forum 02-21-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

Usually the hype is loosely based on something factual. But whenever the real story surfaces it's nothing like Brent's version.
Forum: Boat Review and Purchase Forum 02-21-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

Brent, no one is saying the boat didn't go aground. When a boat is winched off by hand you will very likely stand in deep water up to you neck operating the Tirfor there's no issue with that.

And...
Forum: Boat Review and Purchase Forum 02-20-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

Only one of these claims is directly verifiable, and another event you used to use (the T boned high floating barge) turned out to be a fake when witnesses came forward. So lets look at this claim of...
Forum: Boat Review and Purchase Forum 02-13-2014
Replies: 5,316
Views: 370,519
Posted By MikeJohns
Re: Pros and cons of steel sailboats

Many materials like your talc mixed with paint are more flexible than you think. Everything is flexible to some degree , its very likely that its more flexible that the steel which is very stiff. So...
Showing results 1 to 25 of 80

 

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