Legally, yes. But all Riblett is doing is arithmetically adding the mean line and thickness distribution for each coordinate. And generally he's using the mean lines and thickness distributions right out of the NACA catalog. Nothing special there, and nothing you or I couldn't duplicate easily with a simple spreadsheet. Where his book is a good value is that he's already done the computer runs that show how the "new" versions of the airfoils perform. If you're good with XFoil or Profilii you could do that part yourself, too. So it becomes a measure of how much your time is worth to learn and use those tools. I think his book is a steal, in that context.
The over-complicated, innaccurate "rolling circle" method that the NACA came up with to do the same job is absurd when you see it written out. Only a research scientist could over-complicate simple arithmetic that much...
The over-complicated, innaccurate "rolling circle" method that the NACA came up with to do the same job is absurd when you see it written out. Only a research scientist could over-complicate simple arithmetic that much...