Jim Macklin wrote:
You can work from FAA data, it is public. But you can't
legally copy a manufacturers pages, that is copyrighted.
Also be sure you put make/model and serial number ranges on
the product. Remember you to can be sued if somebody uses
your product and is injured. Talk to your lawyer and
insurance man.

That said, those charts are for speed and convenience, they
are created from mathematical data points by teams of
engineers. That's why you see terms such as "straight line
variation between point" on so many charts.

Even more than that said; as the end user you can scan at
1200 dpi, the charts from you own airplane and they will
print out very big and easy to read.

Good luck, BTW, when I use a performance chart, I always
take the least favorable number if it is too close to call.

Oh, I'm not planning on selling these. They take maybe 1 hour each to
do. I was just planning on putting them up on my website for all to use.