Copenhagen ship curves in DXF or DWG?

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GYXU > Boats > Copenhagen ship curves in DXF or DWG? 23 March 2005 16:13:22

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Copenhagen ship curves in DXF or DWG?
JP Sipponen 21 March 2005 21:14:40
	Do you know a site where these curves can be downloaded? I think they are no more copyrighted? http://www.macnaughtongroup.com/copenhagen_ships_curves.htm Jukkis
		Add comment


Brian D 22 March 2005 02:32:49 [ permanent link ]
	If you find a source for the dwgs, please post here! I'm interested also. Thx, Brian D "JP Sipponen" <sofar@otapoisjippii.fi> wrote in message news:qOD%d.1476$TE5.127@reader1.news.jippii.net...> Do you know a site where these curves can be downloaded? I think they are > no> more copyrighted?> http://www.macnaughtongroup.com/copenhagen_ships_curves.htm> Jukkis>
		Add comment


Glenn Ashmore 22 March 2005 08:43:42 [ permanent link ]
	What would you need them for? Their purpose is for fairing a curve and when you are working with a CAD program the B-spline function takes their place and does a much better job of it.. -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com "Brian D" <briandixoNSn7@comcNSastNS.neNSt> wrote in message news:vr2dnfJes9MS1qLfRVn-tA@comcast.com...> If you find a source for the dwgs, please post here! I'm interested also.> Thx,> Brian D> "JP Sipponen" <sofar@otapoisjippii.fi> wrote in message> news:qOD%d.1476$TE5.127@reader1.news.jippii.net...> > Do you know a site where these curves can be downloaded? I think they more copyrighted?> > http://www.macnaughtongroup.com/copenhagen_ships_curves.htm> > Jukkis> >
		Add comment


JP Sipponen 22 March 2005 10:17:20 [ permanent link ]
	What would you need them for? Their purpose is for fairing a curve and when> you are working with a CAD program the B-spline function takes their place> and does a much better job of it.. Old friend of mine with no computer makes boats and he needs a set of them. They cost over 350 $ so I thought i would make them with a CNC router. Jukkis
		Add comment


Per Corell 22 March 2005 16:54:13 [ permanent link ]
	Hi IThen what shuld be the trouble inserting the image into a CAD program scale it and digitize it ?
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Glenn Ashmore 22 March 2005 17:04:57 [ permanent link ]
	In that case, you could download that picture, import it into Autocad, scale it and trace the patterns. For refference, I have a set of 8 curves and #43 is 24" long and #59 is 12.5" long. Should be fairly easy to trace because, unlike French Curves they are made up of conic sections which is exactly what the non-uniform B-spline algorythm does. -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com "JP Sipponen" <sofar@otapoisjippii.fi> wrote in message news:g6P%d.1638$es2.317@reader1.news.jippii.net...> What would you need them for? Their purpose is for fairing a curve and> when> > you are working with a CAD program the B-spline function takes their place> > and does a much better job of it..> Old friend of mine with no computer makes boats and he needs a set of them.> They cost over 350 $ so I thought i would make them with a CNC router.> Jukkis>
		Add comment


JP Sipponen 22 March 2005 18:18:20 [ permanent link ]
	In that case, you could download that picture, import it into Autocad, scale> it and trace the patterns. For refference, I have a set of 8 curves and #43> is 24" long and #59 is 12.5" long.> Should be fairly easy to trace because, unlike French Curves they are made> up of conic sections which is exactly what the non-uniform B-spline> algorythm does. http://www.macnaughtongroup.com/copenhagen_ships_curves.htm Hmm... Yes... I have only AutoCad LT. Maybe the tracing could be done also with CorelDraw and the curves then be imported into AutoCad LT. The quality of the picture is a bit poor so I hope it does not need lots of rendering. Never tried that tool... Thanks... Jukkis
		Add comment


Evan Gatehouse 23 March 2005 13:46:11 [ permanent link ]
	Skene's Element's of Yacht Design has a much better picture of the most commonly used of the Copenhagen curves. Scan it, import into Autocad and trace over the TIF or similar raster image with some splines. Evan Gatehouse
		Add comment


Per Corell 23 March 2005 16:13:22 [ permanent link ]
	Hi Brian D : "Good 2D and 3D CAD software contains options to do just this, e.g. produce 'developable surfaces' or 'conic section curves'. " Exactly but please don't forget that with the same computer "'developable surfaces'" are not restricted to be shaped as slices of "known geometrics". I know many have bad experiment with socalled unfolding software but realy most bad shapes come from free-download limited software , that can only produce a very rough unfolding ----- fact is that with just a bit effort you can "unfold" reasoable tight poly mesh , the limitations most often is in the number of faces allowed by the CAD program a limitation you can overcome with external files ------ so surely unfolding are tradisionaly done from "known geometrics" but realy you don't need to buckle a troubled assembly of cylinders and cone slices ,fact is that you can unfold computer meshes, you don't need to "build with known geometrics just to unfold.
		Add comment

GYXU > Boats > Copenhagen ship curves in DXF or DWG? 23 March 2005 16:13:22

	see also: Re: Ozymandias, King of Kings Re: What transpired in 2003 that turned…		pass tests:		see also: :-) ... Sri Lanka Vs West Indies

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Copenhagen ship curves in DXF or DWG?

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