On Jun 1, 9:15=A0am, George <gvi...@[EMAIL PROTECTED]
> wrote:
> Hi Robert,
>
> I recently drew up the plans to a stick flyer that I will build this
> year. I used a free copy of Intellicad that I have had for many years.
>
> I got the coordinates for the airfoil from the web, then set up a
> spreadsheet that added the horizontal and vertical position offsets to
> the airfoil coordinates.
>
> I just plotted the final numbers directly into the drawing, starting at
> the leading edge (could have used the trailing edge just as easily)
> drawing a line from point to point. The precision was good enough and
> when I form the ribs by hand I will end up smoothing the minor
> variations as I sand.
>
> For real accuracy (such as you might want for selling plans), break up
> the airfoil into smaller sections, then select that section and convert
> it to a spline, then reconnect it to the larger sections and you are
> done. Well, maybe a bit more complicated than that.
>
> Most all medium to high end drafting programs will do this easily, even
> many low end programs will too.
>
> Draw in full scale and plot in full scale.
>
> Best of luck to you.
>
> George
Winfoil is not a drafting program, but it does generate plot points
and a plot curve from known airfoil data (included in the program) or
from data you im****t or enter. It will then print out a copy of the
airfoil to scale. Were you expecting more ?
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