Information about helicopters, space shuttles, hot air balloons and fighter planes.

A hot air balloon is an aircraft, which is equipped with a bag filled with gas. When the density of the gas is less than that of the surrounding environment, and the static buoyancy generated by the pressure difference is greater than the weight of the balloon itself and the weight it carries, the balloon can float. As a means of transportation, balloons can be used to carry observation instruments and passengers. Unmanned balloons loaded with equipment are often used for scientific research on the atmospheric environment at high altitude and sometimes for measuring cosmic rays. 1783165438+1October 2 1 day, Montgomery brothers completed the first hot air balloon trip of mankind. 1On March 20th, 999, man traveled around the world in a hot air balloon for the first time.

Helicopter is mainly composed of airframe, lift (including rotor and tail rotor), power and transmission system and airborne flight equipment. The rotor is generally driven by a turboshaft engine or a piston engine through a mechanical transmission system consisting of a transmission shaft and a reducer, and can also be driven by the reaction force generated by the jet from the tip of the blade.

Airship is a light aircraft (lighter than air). Its flight lift comes from the buoyancy of air acting on the fuselage. It has a control and propulsion system. Usually, its propulsion system consists of a propeller system driven by an aero-engine. Airships usually have a huge airbag filled with gases lighter than air, such as hydrogen and helium.

Fighter refers to a military aircraft that is mainly used to protect our air superiority and destroy the enemy's ability to use air superiority. It is characterized by excellent flight performance, flexibility and strong firepower; Modern advanced fighters are equipped with all kinds of search and aiming fire control equipment, which can attack all air targets at any time. Fighters are also called fighters, formerly known as expellers. It is characterized by good maneuverability, high speed and strong air combat effectiveness. Their first task is to fight against enemy fighters, seize air superiority, and then intercept enemy bombers, attack aircraft and cruise missiles. Fighters used to be divided into fighters and interceptors according to their tasks. The main task of the interceptor is to gain altitude after rapid launch and destroy enemy bombers before they enter our airspace. Because the interceptor is aimed at the bomber group with high flying altitude, the design emphasizes the demand for speed and climb rate, and the maneuverability is in a less important position.

Space shuttle (also known as space shuttle or space shuttle) is a reusable spacecraft, which travels between space and ground, combining the characteristics of aircraft and spacecraft. It can not only send satellites and other spacecraft into space on behalf of the launch vehicle, but also run in orbit like a manned spacecraft and glide and land in the atmosphere like an airplane. The space shuttle provides a good tool for human beings to enter and leave space freely, greatly reducing the cost of space activities, and is an important milestone in the history of space. 18 On June 18, the American space shuttle Atlantis launched the Jupiter probe Galileo into space.