Actualy the code is an algotithm like any other.  Not protected.

And copyright protects profit, not copying.  And fair use applies.

So a lawsuit might happen, but it would be wrong.

Subject: [FlyRotary] Re: Performance Props
> > The "algorithms" aren't that simple and I don't
> want to take the
> > time to
> > try to put it in a form to upload to this forum.
> The program is
> > based on
> > blade element theory which you can probably find
> in many textbooks,
> > and
> > if you wanted to, you could make your own program
> from scratch that
> > would do the same thing as this program. If I
> uploaded the program
> > itself, that would surely be copyright infringement.
> >
> > Anyway, if you get the book, you also get to read
> about all the
> > underlying theory.
> >
> > --
> > Perry Mick
> > http://www.ductedfan.com
> Oops!  My bad.  You didn't write new code, you
> copied code that was in the book.  Yeah, uploading
> that WOULD place you at the bad end of a lawsuit.
>
> The book will be here in a couple days, and then
> I'll have one more airplane project that I can work on.