My Math Forum 2nd degree curves

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 August 3rd, 2011, 04:36 PM #1 Newbie   Joined: Aug 2011 Posts: 2 Thanks: 0 2nd degree curves [color=#0000FF]Good evening math wizards, I am trying to master the use of “2nd degree curves” while lofting a flying boat fuselage. If I have a curve that I wish to match… for example the Hull profile line from the step to the front post. Is there a method that can be used to quickly match the curve using 2nd degree curves? I am currently moving the 2nd degree curves shoulder point and looking at the resultant curve; I am thinking there must be a better way/method? I can trace the curve with a spline but in doing so it will not be 100% fair and will not be a true 2nd degree curve. The result of running splines with no attention paid to curve types is fairing by eye which can lead to lumpy and bumpy lines. I am no math wizard so please be kind Dave[/color][attachment=0:13pf2swc]BLACKBURN%20B-49B%20REV%20A%20CLYDESMAN%203D%20Model.jpg[/attachment:13pf2swc][attachment=1:13pf2swc]BLACKBURN%20B49B%20CLYDSMAN%20%200001A.jpg[/attachment:13pf2swc]
August 3rd, 2011, 04:41 PM   #2
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Re: 2nd degree curves

[attachment=1:160gxwxo]BLACKBURN%20B49B%20CLYDSMAN%20%200001A.jpg[/attachment:160gxwxo][attachment=1:160gxwxo]BLACKBURN%20B49B%20CLYDSMAN%20%200001A.jpg[/attachment:160gxwxo]

not sure why the attachments did not post and how toedit?
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 August 3rd, 2011, 05:00 PM #3 Senior Member     Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs Re: 2nd degree curves You have to have 10 or more posts to edit...an unfortunate but necessary anti-spam measure taken by our admin. I apologize for the temporary inconvenience. -Mark

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