Flight is the process by which any object achieves sustained movement either through the air (or movement beyond
earth's atmosphere, in the case of spaceflight) by aerodynamically generating lift, propulsive thrust or aerostatically using
buoyancy.
There are different approaches to flight. If an object has a lower density than air, then it is buoyant and is able to float in
the air without using energy. A heavier than air craft, known as an aerodyne, includes flighted animals and insects,
fixed-wing aircraft and rotorcraft. Because the craft is heavier than air, it must use the force of lift to overcome its weight.
The wind resistance caused by the craft moving through the air is called drag and is overcome by propulsive thrust
except in the case of gliding.
Forces relevant to flight are:
Propulsive thrust: (except in gliders)
Lift: created by the reaction to an airflow
Drag: created by aerodynamic friction
Weight: (created by gravity)
Buoyancy: for lighter than air flight
These forces must be balanced for stable flight to occur.
The stabilization of flight angles (roll, yaw and pitch) and the rates of change of these can involve horizontal stabilizers
(i.e. 'a tail'), ailerons and other movable aerodynamic devices which control angular stability i.e. flight attitude (which in
turn affects altitude, heading).
Source: WikepediA
earth's atmosphere, in the case of spaceflight) by aerodynamically generating lift, propulsive thrust or aerostatically using
buoyancy.
There are different approaches to flight. If an object has a lower density than air, then it is buoyant and is able to float in
the air without using energy. A heavier than air craft, known as an aerodyne, includes flighted animals and insects,
fixed-wing aircraft and rotorcraft. Because the craft is heavier than air, it must use the force of lift to overcome its weight.
The wind resistance caused by the craft moving through the air is called drag and is overcome by propulsive thrust
except in the case of gliding.
Forces relevant to flight are:
Propulsive thrust: (except in gliders)
Lift: created by the reaction to an airflow
Drag: created by aerodynamic friction
Weight: (created by gravity)
Buoyancy: for lighter than air flight
These forces must be balanced for stable flight to occur.
The stabilization of flight angles (roll, yaw and pitch) and the rates of change of these can involve horizontal stabilizers
(i.e. 'a tail'), ailerons and other movable aerodynamic devices which control angular stability i.e. flight attitude (which in
turn affects altitude, heading).
Source: WikepediA
Weird Science Kids
fun cool exciting easy science experiments and
Eduacational Toys for kids
fun cool exciting easy science experiments and
Eduacational Toys for kids
