Unpowered aircraft
Videos
Unpowered aircraft can remain airborne for a significant period of time without onboard propulsion. They can be classified as gliders, lighter-than-air balloons and tethered kites. In the case of kite
Hang glider launching from Mount Tamalpais
Gliding
Videos
Gliding is a recreational activity and competitive air sport in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to
A Ventus-2 glider landing while jettisoning water that has been carried as ballast
The "gull wing" Göppingen Gö 3 Minimoa produced in Germany from 1936
Good gliding weather: Competitors studying cumulus humilis, which suggest active thermals and light winds.
A lenticular cloud produced by a mountain wave