An airplane is a machine that can fly by getting air support. It counteracts gravity by using static lift or dynamic lift of airfoil or, in a few cases, the downward thrust of jet engine.

Human activities around airplanes are called aviation. A manned plane is driven by the pilot on board, but an unmanned aircraft can be remotely controlled or controlled by the computer on board. Aircraft can be classified according to different standards, such as lift type, aircraft propulsion, use and so on.

The history of? Aircraft:

The story of flying model aircraft and manned flight can be traced back to many centuries ago. However, the first manned ascent and safe descent in modern times was realized by a larger hot air balloon developed in18th century. Both world wars have led to great technological progress. Therefore, the history of aircraft can be divided into five eras:

Pioneer of flight, from the earliest experiment to 19 14.

World War I, 19 14 pairs 19 18.

Aviation between the two world wars, 19 18 turn 1939.

World War II, 1939 to 1945.

Post-war era, also known as jet era, 1945 till now.

Impact of aircraft use:

Airplanes allow long-distance high-speed travel, which may be a more fuel-efficient mode of transportation in some cases. However, in addition to fuel efficiency considerations, aircraft also have environmental and climate effects. Compared with other forms of travel, they are also relatively noisy, and high-altitude aircraft will produce wakes. Experimental evidence shows that this may change the weather pattern.

The purpose of the plane:

1. Army

A military aircraft is any aircraft operated by any type of legal or rebel armed forces. Military aircraft can be combat or non-combat.

2. Civil

Civil aircraft can be divided into commercial aircraft and general aircraft, but there are some overlaps.

Commercial aircraft include types designed for scheduled flights and charter flights to carry passengers, mail and other goods. Large passenger planes are passenger planes, the largest of which is wide-body aircraft. Some smaller models are also used in general aviation, and some larger models are used as VIP planes.

General aviation is an all-encompassing concept, covering other types of private (pilots don't have time or fees) and commercial purposes, and involving various types of aircraft, such as bizjets, trainers, homemade aircraft, gliders, military aircraft and hot air balloons. Today, the vast majority of aircraft are general aviation models.

3. experimental

An experimental aircraft refers to an aircraft that has not been fully verified in flight, or an aircraft that holds an "experimental" airworthiness certificate from the FAA. Usually, this means that aircraft are testing new aerospace technologies, although the term also refers to amateur and complete aircraft-many of which are based on mature designs.

4. Model

Model plane is a small unmanned aerial vehicle, which is used for entertainment, static display, aerodynamic research or other purposes. Scale models are replicas of some large designs.