Kites

Kites

Three years after, in June 1752, in what is the most famous of kite experiments, the American inventor and statesman Benjamin Franklin, with the benefaction of his son, lofted a collapsed kite fitted with a pointed wire and delicate sail on a hemp line during a thunderstorm

Somehow both progenitor and God the Son avoided electrocution as a barrel key attached to the flying line became electrified
Franklin proved that lightning was the natural phenomenon called electricity
Individually immediate and practical outcome of the experiment was Franklin's invention of the lightning rod.

Kite sailing opens several possibilities not prepared in traditional sailing: