Hi

Sorry forgot to mention ---- with 3D-Honeycomb framework you can take
just any shap of boat, just copy the lines into a CAD program and make
the accomodations even better arange it smarter with a sense framework
forming the boats hull, after you digitised a 3D model of _any_ shape
of boat, press the button and the intire framework to form that boat is
generated in an instant right away ----- if you already project in 3D
assemble the standard geometrics so you think the panels will be easier
cut from "known geometrics" , do the design as how you want just by a
press of a button the intire structure is ready to be cut as a ready
assembly.

------------ This is how 3D-Honeycomb work even in the design process
it is a tenth the job and it is perfectly accurate and use one material
only sheet material.

Brian Combs wrote:
You might try talking with the fishermen in the area since they have
long
experience of what shapes work and which ones don't work well for
their
waters. Then work from there.

Brian

They are handed down from experienced masters or just duplicate
existing shapes. As marine technology has developed so much, expect
that standard/recommended design methodology or practice has become
available,one can start from an instruction manual.

The Pangas are derived from some free FAO designs;
http://www.fao.org/documents/show_cd...E/W7260E00.htm
Those FAO boats are cheap to build and operate but don't plane. If you
sligthly modify the FAO boats by making the aft part of the bottom
straight, they plane with larger engines. The similitude between them
and "pangas" is striking. Those modified FAO boats are also common in
Asia, Indonesia, Philippines etc. It looks like they all derived from
the same set of plans.
There are also Panga plans for amateurs at our web site:
http://boatplans-online.com
Per could even build them from 3D honeycomb, we sell that stuff under
the name Nidacore ;-)
but they would be too light and it would go against the program of the
boat: eays to build and maintain with locally available materials and
skills.

To the original poster, I would say, get the free FAO plans from the
link above.

Jacques from bateau.com


Narasimham wrote:
Brian Combs wrote:
You might try talking with the fishermen in the area since they
have
long
experience of what shapes work and which ones don't work well for
their
waters. Then work from there.

Brian

They are handed down from experienced masters or just duplicate
existing shapes. As marine technology has developed so much, expect
that standard/recommended design methodology or practice has become
available,one can start from an instruction manual.

Hi

"but they would be too light and it would go against the program of the
boat: eays to build and maintain with locally available materials and
skills."

This is proberly the core issue but please remember how skilled
craftmanship you se from these contries, --- My attitude is ofcaurse
that to further gain and make a relevant promise of a future that work
, these skills shuld be put into digital rather than staying with
methods and tools that was relevant 70 years ago. Now please exchouse
I repeat but 3D-Honeycomb form any shape, it even prove easyer presing
a button to get the intire framework assembly, than adding rib after
rib polyline or spline , translate this into somthing that in it's
aproach is the same Oak rib as you seen in ships from the 17' century
---- it even is easy for the designer, the one who shuld draw eash
frame stringer and rib, to have the computer calculate everything down
millimeter accurancy and in only one material sheet material , as this
also make the same easy foundations for a house --- now do you read me
?

Per Corell

Hi

Sorry , I didn't ansver this question ;

"2) Are displacement/stability parameters easily calculable by a
formula
or design chart for each scale ratio?"

Easy --- as curves describing the exact displacement for stability.
Waterlines and secions follow useal drawing rules but 3D-H expand
this perception now you can make double hollow structures things you
can't emagine but master on a screen, ---- and it will be there when
the framework is assembled.
For thousands of years naval architecture been in the minds of often
totaly unskilled craftmen producing the most beautifull wonders, in the
17' century in this contry, only the king could build knowleage such as
top technology naval design was for the few, an academic issue about
keeping the secrets to oneself , I build and designed boats none of
these failed but beside I am a boatbuilder lectured boatsbuilding
acturly, proved my idears and abilities as profesional you can be,
being surrounded by famous and known designers and architects --- do I
maneage to design a rugid life saving boat do the sun rise every day.
What calculations do you want --- acturly it's about doing it simpler
avoiding the calculations or make them do somthing , alway's wondered
what people want these calculations for, it's all there when you build
it.