Lift pushes the airplane up. The way air moves around the wings gives the airplane lift. The shape of the wings helps with lift, too.
Weight is the force that pulls the airplane toward Earth. Airplanes are built so that their weight is spread from front to back. This keeps the airplane balanced.
Thrust is the force that moves the airplane forward. Engines give thrust to airplanes. Sometimes an engine turns a propeller. Sometimes it is a jet engine. It doesn't matter as long as air keeps going over the wings.
Drag slows the airplane. You can feel drag when you walk against a strong wind. Airplanes are designed to let air pass around them with less drag.
An airplane flies when all four forces work together.
PARTS OF A PLANE
DIAGRAM OF A JET ENGINE
In 1783 the Montgolfier brothers gave a flight demonstration in their balloon.
wright brothers' glider
Flight over Chicago 1911
Orville Wright makes the first successful controlled airplane flight in history, on December 17, 1903. The flight took place at Kill Devil Hills, North Carolina.
World War I dogfight
women factory workers during World War II
United States Air Force, The: F-16 Fighting Falcons
The Concorde was a passenger aircraft that could fly faster than the speed of sound.
Airplanes are parked between missions on the flight deck of a nuclear-powered aircraft carrier.