Thanks a bunch Eric,

Pure magic how these NACA foils can pass through the water without bruising it.

Sounds like you have some depth in this. Can you disclose your current project? I have a sense that it will be fast and effecient, whatever it is.

Best,

Reg

: I was just messing around in Rhino and decided to show how they are measuring
: the very front point, it looks like. If you are doing this all by hand, it
: would be very hard to plot so many points accurately near the leading
: edge, so I assume that's why they give a separate radius calculation. You
: can see in the example on the right, I have 50 sample points spread evenly
: over the chord... it breaks down near the front because of the rapid
: curvature change. That's why I added the X^4 function which still only
: uses 50 points, but makes the small X numbers toward the leading edge even
: smaller, making them bunch up and makes a more perfect shape. You can see
: my automatic dimensioning in Rhino shows the very leading edge to be
: accurate at .095".

: Eric