Re: [PSUBS-MAILIST] Shark Skin Effect

[DJACKSON99@aol.com]

If the hull or shell is fiberglass and you are using a female mold, you should  able to use a woven cloth against a thin gel coat in order to encourage the print through from the fabric. Might even be able to do this over a male mold if an impregnator was used to remove all excess resin, but I've never tried it. What size, shape, and depth of dimple is best? Golf ball size?  -- Doug

In a message dated 1/13/2003 7:18:09 PM Eastern Standard Time, publisher@thegreenbayweb.com writes:

> I wonder, instead of rolling it into the surface of the steel... a very costly process... could it be attached as an applique... maybe something like vinyl glued to the surface?  Maybe even an epoxy paint with the pattern rolled into it as it dries?  Just a thought.
> 
> On Mon, 2003-01-13 at 16:21, Garry Muir wrote: 
> Hi Folks
> 
> There was some discussion a while back about sharks skin and the way the 
> denticles produce a laminate flow over it reducing drag. I was looking 
> through some scratch notes I made a few years back on trawl doors and I 
> am quite sure a company tried rolling a pattern on steel plate that 
> would replicate the effect and for some reason I think it may have been 
> NETS of Seattle.
> I will delve into my files or should I say large confused heap on the 
> floor and get some more info, it may not be a practical finish for a sub 
> hull but it may have some advantages on control surfaces and appendages.
> 
> Regards, Garry
> Dale A. RabyEditor/PublisherThe Green Bay 
> Webhttp://www.thegreenbayweb.com