Fairing

Reading a tutorial based on Rhino I've learn that is very important to make an hull fair,but why?
Maybe because when we have a big gradient of curvature we have also an high value of tensile stress?If it is true is it maybe better use a software that can appreciate the variation of curvature not only with a gradient of colour but also numerically ( for exemle Catia)?
Thanx

Mirko

 

Why?
For good look and performance

 

Fairing...

I'm not sure if you understand "fairing" ...apologies Smircio if you do.
In the context of hull design when we refer to a hull or deck or cabin side or whatever being "fair" we are most concerned with appearance.
Have you ever looked along the side of a hull where you can see a reflection that is out of shape...it is due to poor quality finishing..or not enough work in the preparation. It may even be a frame out of place during construction.

It may be a bump or a hollow that shouldn't be there...we look at it and say.."its not faired properly".

It's the bloody English language...

you can go to a fair,
a bad decision might not be fair
you can add a fairing
or you can fair a shape
In Australia we say "jeez mate, fair go"!

Hope this helps,
It was a fair question.

 

If you think about it, the whole boat building process reduces the accuracy of the finished product, compared to what you drew in the first place. Consequently, we have to bear that in mind and start with a really nice set of plans that are both complete and the shape we want.

It takes years to work out how to fair a shape properly, and in that time requires an awful lot of practice. However, once you can draw a fair hull on CAD, You know that firstly the outside shape will be at least reasonably efficient, and that everything on the inside will fit properly.

Tim B.

 

I have noticed that while new low cost polyester boats are very smooth and shiny they are very often unfair, with lots of bumps and hollows. Is this by design (bad cad to cam?) or poor building techniques?

 

Thor

Mostly I think it is poor building technic. Also most low budget boats are rip offs from productions hulls

If you use modern technic with CNC milled pluggs you get a very good result

http://www.boatdesign.net/gallery/showphoto.php/photo/2473/size/big/ppuser/1809

Btw isnt a Fairing a nice looking Norwegian boat

Hans

 

Færing with special characther æ or Æ often written as ae or AE like faering.
This is really any boat wit four oars I think, we also have seksring and åttring with six and eight oars. I think faering nowadays very often means a small klinker built double ender with quite vertical stem, low freeboars amidship (to take the fish aboard). Every district has their style, we have Åfjordsfæring and Bindalsfæring for example

http://www.istavern.no/index/galleri/image_full/205/

 

Fairing.. does not it has role in the speed of the ship? obviously there is a question of look when we talk abt the above water part.. but wht abt the under water part? and also it has a role in pitching movement. if u have a good shape and a fair one it will work better..

 

Need hlp on the defination on "End Surface" at stem, Half Siding & Half Radius. thanx in advance..
kk

 

For fairing wht r the equations/ charecterastic of lines or curves.. pl hlp.. Thanx in advance..
kk

 

i'm not a sexmaniac anymore but got pictures?

 

Sorry to dissapoint you, this is from
http://www.eldjarnbaat.no/byggeliste.html

 

I don't know, but I had a Norwegian girlfriend for a couple of years… and I’d say she was fine!