User:John Bessa/Square lifeboat

Basic ideas

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:

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

Sine curve

Side, or profile, view

Ellipse

Top-down, or plan view

Double hyperbola

cross section at midship, correctly Hyperbolic Cosine

Spiral

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

Submarine

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

Actual wave shape

What we see as the water goes around the boat

Historical approaches to performance

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

Napoleon's contribution? (From Hornblower)