A glider is an aircraft heavier than air that has no engine, but with their large wings can be kept in the air. His buoyancy come solely from the resulting overall aerodynamics. Can glide long distances at high speed with a minimum loss of height in between.At the beginning of the flight are driven by an airplane using a cable, which is expulsed when reach the required height. After the plane landed and the glider is released, taking advantage of areas with hot air for not losing height and continue flying.
The practice is often called gliding. Some gliders, known as motor gliders are used for gliding and soaring as well, but have engines which can, in some cases, be used for take-off or for extending a flight. Gliders have also been used for military purposes and for research.
A glider's competition:

Un coet és un grup autònom propulsat per la força de reacció creada mitjançant l’expulsió de massa en una direcció determinada. Els coets es coneixen per la seva aplicació en l’astronàutica, ja que són l’únic mitjà per posar objectes en òrbita fora de l’atmosfera terrestre. Un coet adquireix velocitat gràcies al fet d’expulsar una part de la seva massa a l’exterior, cosa que genera una força en direcció contrària a la força d’expulsió.
The helicopter is an aircraft propelled by an engine. It consists of a set of rotating wings , located at the top of the device. In s.XV, Leonardo da Vinci designed a machine with the objective of get a vertical flight. Years later, with the development of technical and scientific knowledge, new designs were developed to achieve this. It was not until 1906 that Jacques and Louis Breguet began experimenting with propellers for helicopters and in 1907 built the Giropla No. 1, he got up the flight with a pilot 0.6 feet for a minute. The same year the French inventor Paul Cornu designed and built a helicopter that was stable. In November 1907 it took off, manned by its inventor, 0.3 m for 20 seconds. He made several more flights but eventually abandoned the project.




Un dirigible és un aeròstat amb propulsió i capacitat de maniobrar per poder ser controlat lliurement. És més lleuger que l'aire i això li permet propulsar-se per l'aire mitjançant timons i hèlices. Té una forma de globus ovalat per oferir una menor resistència aerodinàmica en l'avanç.

