Controllable slope soaring
Videos
Controllable-slope soaring is a type of slope soaring where a slope is made to follow a walkalong glider, both sustaining and controlling the glider's trajectory by modifying the wind in the vicinity
Person flying a Walkalong glider by controllable-slope soaring.
Flight
Videos
Flight or flying is the motion of an object through an atmosphere or through the vacuum of space, in this case also called spaceflight, without contacting any planetary surface. This can be achieved b
Bird flight by a brown pelican.
Human-engineered flight: a United Airlines Boeing 787 taking off from Heathrow Airport in December 2013.
An airship flies because the upward force, from air displacement, is equal to or greater than the force of gravity
Female mallard duck