User:John Bessa/Square lifeboat

Basic ideas

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Storm Petrel is Phil Bolger's idea of the smallest seaworthy boat. It is a core inspiration for a square lifeboat as it specifies a 'box' midships, and then fairings out either end - he calls it a motorsailer, what? - it's a rowboat - my idea is to build this much longer, with the 'box' being most of the boat and independently-floatable and probably steel - the ends would be pointy, wet and fiberglass, so it would be an - awkward junk-style hull w/o the ends (fairings) - and a sleek pointy thing w long overhang w the fairings - stern fairling would have a hole(s) in it for the outboard(s) - with mizzen just behind tiller (?) to be both inboard and outboard

The center 'box' that phil described in storm petrel does not have to be a literal box (or punt) - so, there is fieldmouse from the same book - feeling is that, no matter how big, many boats can be evolved from small boats - it will attempt to get performance from length reinforced with thrifty design - economies in the hull (only 1/4 total ship cost) are false economies...

A problem:

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The wiki-sphere requires that illustrations be either original, copylefted in some way, or in the public domain. Since I am describing older works, there is much I can use as older material is in the public domain. But, say, mathematical drawings that I would, and should, access from experts may not be, probably isn't as getting people to remove their material from 'Intellectual Property Rights' is nearly impossible for reasons I don't understand. So beit: For starters I will make parallel 'notes' on FaceBook, which allows 'fair use' (which the wiki-sphere should, but does not), and reference them until I am able to create my own illustrations which will be in the public domain. Then, when I can, I will create an independent wiki that is not hobbled by the wiki-sphere's restriction.

My naval architecture

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Sine curve

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Side, or profile, view

Ellipse

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Top-down, or plan view

Double hyperbola

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cross section at midship, correctly Hyperbolic Cosine

Spiral

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View of water passing along each side of boat (two of them).

Submarine

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Theoretical shape beneath the water, usually within the boat that is centered around the 'shock wave.'

Actual wave shape

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What we see as the water goes around the boat

Historical approaches to performance

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Sharpie Commodore's adaption of the sharpie to the round bottom V-bottom whose chine is the wave line Rounding the v-bottom to create a round bottom

Pure wave line form

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Napoleon's contribution? (From Hornblower)