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#231436 - 04/21/11 11:27 PM Re: Foam strip construction * [Re: RetiredGeek]  
Joined: Apr 2011
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soulkeep Offline
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soulkeep  Offline
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Thank you suggest, but good things to come.


cabal cabal
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#231442 - 04/22/11 03:47 PM Re: Foam strip construction [Re: RetiredGeek]  
Joined: Sep 2007
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RetiredGeek Offline
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RetiredGeek  Offline
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NZ
Forgot to mention that all hydro's pics are at 100kg displacement, but the hull is capable of carrying 135kg
cheers
RG

#231493 - 04/25/11 01:19 PM Re: Foam strip construction [Re: RetiredGeek]  
Joined: May 2003
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Rolf_Nilsen Offline
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Carpal Tunnel

Joined: May 2003
Posts: 4,451
West coast of Norway
Two quickies smile

1:
What is your philosophy on how to design the hullform for wave handling (if that is something you feel like sharing). I noticed that your modelling is all done in flat water which I assume is a good starting point for optimization. But wave action changes "everything", or??

2:
What software are you using (I assume something really expensive, and I ask not becouse I want to design a boat becouse I am curious).



The Lindahl build looks really good! Much easier than our strip-plank project. Only thing I dont get is how they fit the trampoline to the hulls.

#231502 - 04/25/11 05:08 PM Re: Foam strip construction [Re: Rolf_Nilsen]  
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RetiredGeek Offline
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RetiredGeek  Offline
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NZ
On the LR3 John used the little tool in the first pic to create the indentation, the final attach looked like what you see in the 2nd pic.

Whether the hull is in flat water or in waves, shapes are driven by drag. Software that can handle waves like Fine Marine / Numeca is hugely expensive and requires an expensive computer to run it also, so we had to come up with another solution. The previous pic's can be generated on a case by case basis in about 10-15 minutes on a laptop, and enough data points for a VPP can be generated overnight, so this capability allows you to look at a lot hull shape variations very quickly which ultimately means you spend 3-5 times the amount of time designing a shape because you can play with so many variables and have an idea of what the consequences of any particular change is. This software is not available commercially at this time, but maybe in the future.

Attached Files
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302.JPG (1766 downloads)
#231531 - 04/26/11 11:14 AM Re: Foam strip construction [Re: RetiredGeek]  
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Rolf_Nilsen Offline
Rolf_Nilsen  Offline

Carpal Tunnel

Joined: May 2003
Posts: 4,451
West coast of Norway
So the steel pin stay in there and he sands + adds some cloth on top of it. Neat! But looks a bit work intensive. Will unfortunately not work as well for us on our strip plank hulls + ply decks.


Spending time on the computer is OK, if some surprises can be avoided. And you dont have to do all that sanding smile

Thanks for a good reply.

#231556 - 04/26/11 04:40 PM Re: Foam strip construction [Re: RetiredGeek]  
Joined: Aug 2001
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Luiz Offline
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Luiz  Offline
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Asuncion, Paraguay
Originally Posted by RetiredGeek


In an update on other stuff, not sure that the original round bilge design is going to make it to production anymore....as with most of the planet, the builder has money issues.

That said, I have been working (very very sporadically) on another F12 design, no builder or customer in mind, more or less for my own pleasure. This is not being offered, nor will it be available to anyone anytime soon....the attached pics are just eye candy.



Sorry to hear that.
Meanwhile I just sold the big tri (see avatar) and will probably look for a new project in a few months. Keep in touch.


Luiz
#231564 - 04/26/11 09:44 PM Re: Foam strip construction [Re: Luiz]  
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Seeker Offline
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Seeker  Offline
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Ft. Pierce, Fl. USA
Do you have closer view of the finished product...bit hard for me to tell what kind of impression the "tool" formed from that far away....while you are at it do you have another picture of the "tool" before it is embedded? Interesting method, just trying to get a better perspective on what I am looking at... thank you...

#231597 - 04/27/11 05:33 PM Re: Foam strip construction [Re: Seeker]  
Joined: Sep 2007
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RetiredGeek Offline
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RetiredGeek  Offline
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NZ
Originally Posted by Seeker
Do you have closer view of the finished product...bit hard for me to tell what kind of impression the "tool" formed from that far away....while you are at it do you have another picture of the "tool" before it is embedded? Interesting method, just trying to get a better perspective on what I am looking at... thank you...


sorry,don't have other pic's, but its essentially a round peg with a stainless cross piece that leaves an indentation. After it sets you insert a stainless pin and carbon over it all, fill, sand and fair....quite a lot of work. It would be easier to insert a wooden block inside and epoxy and screw in some padeyes.

#231727 - 04/29/11 11:19 PM Re: Foam strip construction [Re: RetiredGeek]  
Joined: Apr 2011
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miranbaa Offline
stranger
miranbaa  Offline
stranger

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What have you really


sbobet sbobet
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