AutoCAD 2010/2011/2012

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New Member
gobi.kastelic
Posts: 2
Registered: ‎01-15-2012
Message 1 of 13 (3,854 Views)

Plotting an airfoil in AutoCad 2012

3854 Views, 12 Replies
01-15-2012 02:22 PM

Hi

 

I just downloaded AutoCad so I am very unfamiliar with it but I do need so help witha particular problem.  I need to be able to import the airfoil geometry of a NACA 2412 airfoil.  I know how to get the XY coordinates but I don't know how to import these points (as a .txt file?) into ACAD.  What function would I use?  Spline?  If so how do I get it to draw all the points I have?  I need to then extrude the shape to be able to mill airfoil sections...that part I can figure out....just need to import the points to get a nice curve.

 

Thanks for any (and quick :smileyhappy: ) help!

*Expert Elite*
Patchy
Posts: 6,207
Registered: ‎09-16-2009
Message 2 of 13 (3,827 Views)

Re: Plotting an airfoil in AutoCad 2012

01-15-2012 09:17 PM in reply to: gobi.kastelic

Very easy.

Open that .txt file, highlight the coordinates and CTRL+C

 

Go to autocad, type in Spline or Pline command, when it prompts for first point, right click and Paste.

New Member
gobi.kastelic
Posts: 2
Registered: ‎01-15-2012
Message 3 of 13 (3,822 Views)

Re: Plotting an airfoil in AutoCad 2012

01-15-2012 09:52 PM in reply to: Patchy

Ok, got it to plot  a good looking airfoil.  Is there a way to scale the airfoil?  Right now it is at an inch long, I'd like it to go to 6 inches while keeping the same shape - is this even possible since I input discrete numbers for each point on the curves?

*Expert Elite*
Patchy
Posts: 6,207
Registered: ‎09-16-2009
Message 4 of 13 (3,814 Views)

Re: Plotting an airfoil in AutoCad 2012

01-15-2012 10:17 PM in reply to: gobi.kastelic

Snap a picture or attach your drawing here, I don't want to lead you the wrong way.

New Member
kick507
Posts: 2
Registered: ‎01-28-2013
Message 5 of 13 (3,032 Views)

Re: Plotting an airfoil in AutoCad 2012

01-28-2013 06:56 PM in reply to: gobi.kastelic

i am attaching the coordinates file ......please tell me how to draw in cad with correct dimensions 

New Member
kick507
Posts: 2
Registered: ‎01-28-2013
Message 6 of 13 (3,030 Views)

Re: Plotting an airfoil in AutoCad 2012

01-28-2013 06:58 PM in reply to: kick507

this is diagram of airfoil.

*Expert Elite*
Patchy
Posts: 6,207
Registered: ‎09-16-2009
Message 7 of 13 (3,011 Views)

Re: Plotting an airfoil in AutoCad 2012

01-28-2013 11:28 PM in reply to: kick507

Put texts in the correct format as shown, then command SPLINE, when it prompts for starting point, Paste the texts in.

Active Contributor
LaserGuy
Posts: 46
Registered: ‎03-24-2011
Message 8 of 13 (2,987 Views)

Re: Plotting an airfoil in AutoCad 2012

01-29-2013 06:52 AM in reply to: Patchy

+1, and my 2 cents

 

Airfoil.JPG

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Member
jemo07
Posts: 4
Registered: ‎02-08-2013
Message 9 of 13 (2,913 Views)

Re: Plotting an airfoil in AutoCad 2012

02-08-2013 12:24 PM in reply to: LaserGuy

Hi, 

 

I am in the same situation as the previous post. I have created my airfoil, but I would like to set it to 160 cm, How do I resize the object to scale this new dimension. 

 

I have the image I created in order to understand where I am at currently. 

 

Regards, 

 

JM

 

 

Member
jemo07
Posts: 4
Registered: ‎02-08-2013
Message 10 of 13 (2,896 Views)

Re: Plotting an airfoil in AutoCad 2012

02-09-2013 04:10 AM in reply to: jemo07

Hi again, also, when I try to do to a dimension, I can do it for just about anuthing, but not for a Spline, like the airfoil, How do I manage that also?

 

Thank you all in advance, 

 

JM

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