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
Propulsion
Videos
Propulsion is the generation of force by any combination of pushing and/or pulling to modify the translational motion of an object, which is typically a rigid body but may also concern a fluid. A prop
Armadillo Aerospace's quad rocket vehicle showing shock diamonds in the exhaust plume from its propulsion system
A turboprop-engined Tupolev Tu-95
Wheels are commonly used in ground propulsion
Transrapid 09 at the Emsland test facility in Germany