UK-Cherub Forum

Cherub Chat => Tech Chat => Topic started by: Stuberry on February 04, 2009, 08:25:14 PM

Title: Not fairing hulls
Post by: Stuberry on February 04, 2009, 08:25:14 PM: What do you think of using this method over the last layer of glass/carbon on the outside of the hull:

A new Technique for Epoxy-Glass (http://duckworksmagazine.com/03/r/articles/glass/bottom.htm)

edit: Thinking about this further, it would be a nightmare trying to get it around corners.
Title: Re: Not fairing hulls
Post by: ghislain_devouthon on February 05, 2009, 12:52:22 PM: Interesting to use on huge developped area.

To get round the corner you probably need to do it chine by chine.
Title: Re: Not fairing hulls
Post by: phil_kirk on February 05, 2009, 12:59:49 PM: The sanding and fairing is character building.

It's event better when it's someone else's character that's being built!
Title: Re: Not fairing hulls
Post by: roland_trim on February 05, 2009, 01:37:45 PM: You could always use a single sheet of PVC over the entire hull? B&! dust sheet might do it. Best to test first I'd guess....
Title: Re: Not fairing hulls
Post by: JimC on February 09, 2009, 07:56:57 PM: Quote from: stu_tinner on February 04, 2009, 08:25:14 PM
What do you think of using this method over the last layer of glass/carbon on the outside of the hull:
Doesn't look great for the old resin/fibre ratio... Peel ply and filler will be lighter. I also wonder about actual fairness as opposed to smooth... But great for a sexy finish on small things where weight doesn't matter like bits for your car or whatever.
Title: Re: Not fairing hulls
Post by: andy_paterson on February 13, 2009, 08:53:00 PM: How does this compress the glass weave?
All it will do is add extra resin to fill all the hollows between the weave - 'nice and shiny', but resin is much heavier than filler.
Title: Re: Not fairing hulls
Post by: roland_trim on February 15, 2009, 04:03:01 PM: The concept is similar to infusion - i.e. extra resin goes to the breather at the edges. All nice in theory, but as we will have to paint the boat green when it is finished not what we are thinking of for BMG's boat.
Title: Re: Not fairing hulls
Post by: dave_ching on February 16, 2009, 05:56:49 PM: If image is all your worried about it looks like a good idea.
The clue to the reason you fair something is in the title.
The long board highlights any hollows or bumps and with some effort removes them.
This method looks good for making a pretty surface but if you haven't faired it at some stage it will still be a pretty bumpy surface.
Title: Re: Not fairing hulls
Post by: daryl_wilkinson on June 19, 2009, 11:28:49 AM: This won't work for hulls but foils?....

Strojnick... suggests this technique that is sometimes used for making airplane wings. Lay up a skin of fiberglass on a piece of Plexiglas. When it has partially set, but not yet hard, peel it off the plastic and form it around a male mold for the final cure. This gives a very smooth finish without the difficulty of having to make your mold very smooth. His books go into much more detail.
Title: Re: Not fairing hulls
Post by: Will_Lee on June 19, 2009, 02:26:50 PM: Nice!
Title: Re: Not fairing hulls
Post by: dave_ching on June 22, 2009, 07:26:27 PM: Great if your name is Lewis and you like playing cricket on rainy days.
Title: Re: Not fairing hulls
Post by: daryl_wilkinson on June 22, 2009, 09:07:28 PM: Sorry, I really don't understand what on earth you are talking about?