The planes hummed along, winds keening over their long flexible wings.

Rogallo had been interested in the flexible wing since 1945.

Most flexible wings are set up with near neutral roll due to sideslip (anhedral effect).

In both flexible and rigid wings the pilot hangs below the wing without any additional fairing.

It was not a success in operation as its flexible wings experienced buffeting and vibration problems.

It is certain that many people from many countries, made contributions to the development of the flexible wing hang glider.

One promising approach that could rival slats are flexible wings.

In flexible wings, much or all of a wing surface can change shape in flight to deflect air flow.

In addition, the flexible wing lends itself open to design changes for possible improvements.

This seems to be the first foot-launch of a flexible wing not using skis.