Hi

The CNC is the sideeffect the gain but youdo not need a CNC mashin to
cut the framework , it can be cut with quite tradisional tools or
mashins.
The plans can be plottet on paper in full size and in the simplest way
to make the boat, you simply spray glue the full scale plans ontop the
sheet material and cut from the lines on the drawings, ---- the pieces
will fit together perfect.
But the technology I point to is the simplest and cheapest way to
establish a real digital production, the N.C. cutter is the cheapest
N.C. controlled equipment on the marked, but there are much more to it
--- the concept is a compleat change of aproach it make 4 boats at the
same time as 1 with the old methods.

Ontop there are the thing about materials this method ask only one type
of material sheet material. Where other methods ask 20 different
profiles knees , hangers, stringers nuts and bolts ----- again with the
3D-Honeycomb you do not bend any piece of the ribs or frames , when cut
flat they slide together to form a reliable and in terms of design and
projecting very rugid and simple structure ; again you do not bend one
single piece and pieces when cut fit perfect together, this is very
different from the time comsuming aproach you se in other methods where
fiddeling and bending acturly is a big and time comsuming part of it.
With this method you get the boat in the drawings. and pieces can be
made everywhere are easy to transport before assembling .

Now did I point to the fact that in easy terms and in a way everyone
can understand, computer design and cheap digital projecting make sense
and point to other progress such as how to build a house at a third the
cost so strong it will resist an earthquake , but if this issue
interest you please check the hundreds of structures to explain the
3D-Honeycomb concept, --- how also in architecture the 3D-H structure
offer a new aproach a new way to build and project a building by
offering the basic structure in a way that promise the new jobs and the
cheap strong new houses.

This concept do not deal with rebuilding with dirtbags, barbed wire and
mud --- it promise the new technology at a state everyone can
understand just by looking at it, it acturly make the computer work
where today's design and architect applications mainly is about making
a digital account , it is so different from the old methods and still
it only build ontop and offer just what you can emagine , but in a way
you can call digital.

P.C.

Narasimham wrote:
Am mechanical engineer with a composites background presently
residing
in south India. After recent Tsunami disaster, toying with the idea
to
help make hand /sail/outboard moter powered fiberglass fishing boats
of
standard 30 feet length. Raw materials .. chopped strand mat,
fiberglass cloth, polyester resin and rigid PU foam are commercially
available locally, as is semi-skilled labour who could make boats to
pre designed drawings.

Can someone help to guide in the following ?
Shapes: Are drawings available on net? or on payment? What hull shape
is better? U? Flatbottom?

Do Lloyds or other certifying agencies based in Europe/US have a
branch or mechanism to test and certify marine craft after
fabrication
and testing when involved right from beginning stages in India?

If existing wooden hull shapes are duplicated but replaced by solid
fiberglass laminate or polyurethene foam (closed cell to keep out
water) sandwich, would it serve the purpose with stability resisting
wave forces with adequate margin before capsizing?

For a physics picture of stability:

1) Is metacentric height a parameter to assess stability?
2) Draft. On what factors is load-depth of immersion relations
established?
Hope not a tall order. TIA for all helpful tips.

G.L.Narasimham

why don't you just BUILD one of your designs,and stop all the
BULL****???

Hi
Alex in all times so many people wished they was the ones one of the
small group of listeners "if I could have been there" , "I would have
understood" , "I would have understood"

Would they ? --- those who talk nicely about their dead prophets and
hount the visionary .
The fake priests that is better twisting words than offering just one
good thought for those who suffer.
Then one asked the master, not to get the ansver he presumably
expected, but to find just one word to make him a fool . To hount and
squeze to do what they alway's did with their prophets. --- Stick deep
Eh.

I failed to enter my message yesterday. I'll try again. Thirty or so
years ago the Constant Camber method of cold-molding boats was invented
by some multihull designers who were working for the UN Food and
Agriculture Organization and the World Bank to help Third-World
fishermen repatriate their boatbuilding, and do it with indigenous
materials mostly, and return to easily-propelled forms that might
relieve these fishermen from the need for imported motors and fuels. In
general, though the method is great for building certains families of
forms with any wood you can slash into veneers, and only the glues
needed to be imported, the projects in various parts of the world
generally faltered: fishermen didn't want to go back to oar and sail,
and corruption carried off the money. I don't know who builds in
Constant Camber now except a for an occasional big multihull. And
myself. I have built about 66 small CC rowing and sailing craft, canoe
bodied, and the method is marvelously efficient for such boats, cheaper
than making equivalent boats out of purchased flat plywood, and
resultes in light, strong, durable, low-maintenance boats, easily
driven. But to get to the important part of this note, it's just a
warning against trying to deflect the fishermen from their customary
boat types. It does seem to be one of the best places to put aid: into
restoring the fishing fleet; but I don't know why it can't be done real
fast with brute money and available boats that are much like the ones
we've all seen trashed by the wave. There must be many with this
impulse to help, and I have assumed that people much more knowledgeable
than I are on the scene already, bless them.

Hi

You write it yourself "thirty years ago or so".
But this is not what will spark a fast rebuild it will not make the new
jobs it is old technikes what do you expect.

Now about my role in this please read the following text, please ask
yourself what ansver is relevant, protecting the dead profets hounting
the real visionary ;


"Then one who studied the law come to him and ask --- not to get an
ansver but to justify himself, Guess we all know this kind of questions
they ask only in the hope that the one who ansver, will ansver in a way
that will make him "impossible" in the minds of those who listen, or by
twisting the words make the ansver silli ---- and if he do not ansver
or ansver somthing they don't expect they will display a head shaking
attitude
saying "there you se" ."

In this group you se the ansver in this tread, this is not about
helping those who suffered to make the new hope or create the new jobs,
to do that you must invest in the new options realise the digital tools
that is so different from old fasion building a boat or building a
house , --- now just wait , there will be yet another hatefull usenet
fanatic with just another filth ansver somone who will display the
social skills that is praised in this group.

P.C.

alex wrote:
why don't you just BUILD one of your designs,and stop
all the BULL****???

In such a traditinal field especially when it is expensive in a
developing country after disaster one needs to be cautious,proceeding
without expert advice could result in part or full b...

Hi

I only promise that in 3,5 years the issue of rebuilding the structures
like boats and houses is already solved, then ontop come the gains of a
new technike at it's original form.
What can be acomblished in terms of beautifull buildings can't be
explained you don't need a naval architect for that, this requier a
designer, One that maneage to spell hell in small caps.

wrote in message
ups.com...
Hi

I only promise that in 3,5 years the issue of rebuilding the structures
like boats and houses is already solved, then ontop come the gains of a
new technike at it's original form.
What can be acomblished in terms of beautifull buildings can't be
explained you don't need a naval architect for that, this requier a
designer, One that maneage to spell hell in small caps.

Per,

Regardless of how advanced your designs may be, it is likely that the
fishermen in these countries will be very reluctant to suddenly adopt a type
of boat with which they are unfamiliar.

They depend on these boats for their lives and livelihood, and must be
prepared to maintain them with their own hands and only the most primitive
tools and equipment, perhaps performing emergency repairs alone on a remote
beach.

Most have minimal formal education, because they have been fishing and
building boats since childhood. They would have a very hard time reading
plans or managing unfamiliar production techniques (e.g. epoxy), etc., and
would in all likelihood reject your innovative designs in favor of old,
trusted (if technically inferior) favorites.

Alex

Hi
You are quite right, ---- what I notised was that either you se
glasfiber hulls small types or fairly old not very well shape old
wooden ones, the dameages seen is those you expece on old very old
boats, but this is somthing you need a boatbuilder to say , I just was
stunned about how wet soft and weak the planks in many of these wecks
seemed , as if this was very old hulls patched and paintet but looking
worn out in terms of how the wood broke.
In these contries anything can be turned into somthing they are very
well skilled craftmen .
Then what I point to is a technike so much more simple even towerds the
technike you would use to rebuild what was there, ---- epoxies from my
oppinion is not the right attitude the tradisional glasfiber hulls take
lots of time the fumes are not very healty and the stuff is specialised
and expensive and ask a huge knowleage, putting together an assembly
framework is easy covering it with paneline just as easy, sorry I cant
do anything about the cost of the cheapest materials ,but the maerials
for the 3D-H concept are the cheapest ones and ptting it together is
the simplest technike in boatsbuilding.