All flight is based upon producing air pressure, all flight energy consists in overcoming air pressure.

We returned home, after these experiments, with the conviction that sailing flight was not the exclusive prerogative of birds.

But we must admit the possibility that continued investigation and experience will bring us ever nearer to that solemn moment, when the first man will rise from earth by means of wings, if only for a few seconds, and mark that historical moment which heralds the inauguration of a new era in our civilization.

No one can realize how substantial the air is, until he feels its supporting power beneath him. It inspires confidence at once.