Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: Overloaded on February 26, 2008, 11:17:44 AM

Title: Drawing an Airfoil for LCam
Post by: Overloaded on February 26, 2008, 11:17:44 AM

Hey All,
Can someone get me started with 'how to draw an airfoil' in AC Lt 98 that will work in LCam ?
I can find the NACA coordinates for the points but then I'm stuck. I'm relatively sure that I'm not to simply connect the dots......?
Thanks,
RC

Title: Re: Drawing an Airfoil for LCam
Post by: Graham Waterworth on February 26, 2008, 11:35:37 AM

I have never used LT but on my system I do a "create spline from points" command and it fits the best curve it can between the points.  Then I do a convert spline to lines and arcs.

Graham.

Title: Re: Drawing an Airfoil for LCam
Post by: Overloaded on February 26, 2008, 04:18:48 PM

LT doesn't seem to have those functions.....I'll dig a little deeper later on.
Thanks Graham,
RC

Title: Re: Drawing an Airfoil for LCam
Post by: Overloaded on February 27, 2008, 08:15:13 AM

Graham,
Is the "arc-fit polyline" and "spline-fit polyline" = to what you are referring to ?
If I post a spline .dwg, would you convert it for me ?
Thanks,
RC

Title: Re: Drawing an Airfoil for LCam
Post by: Graham Waterworth on February 27, 2008, 08:40:52 AM

spline-fit polyline sound very near. I will try to convert it for you.

Graham.

Title: Re: Drawing an Airfoil for LCam
Post by: Overloaded on February 28, 2008, 10:07:19 AM

Thanks Graham,
A net search revealed a dwg. file for every airfoil ever documented...No need to draw them.
RC

Title: Re: Drawing an Airfoil for LCam
Post by: Chip on February 28, 2008, 11:57:12 PM

Hi, RC

Would you post the link for the airfoils.

Is this the one ?  http://isoar.ca/~andrewm/rc/airfoils/index.html

Thanks, Chip


Edit: Thanks, RC, Chip

Title: Re: Drawing an Airfoil for LCam
Post by: Overloaded on February 29, 2008, 06:41:38 AM

Hello Chip,
The one you have there is good. I'll keep it too.
The one that I found is: http://www.davincitechnologies.com/AirfoilOptimizerStdAirfoils.htm
Thanks,
RC

And here are the tables of coordinates: http://www.pdas.com/avd.htm