The first rocket with liquid fuel By Oana

The first rocket with liquid fuel By Oana Latcu

What is a rocket? • A rocket is a vehicle, a projectile, an aircraft or a spacecraft whose force required to displace is obtained by reacting the object itself at the high velocity ejection of gases produced by the combustion of liquid or gaseous fuel from a rocket engine. • The principles and laws of physics after which a rocket is moving are the principle of action and reaction, which is one of the laws of classical mechanics (also known as Newton’s Laws ) and the law of impulse preservation.

About the liquid fuel rocket The rocket technically called a-4 used as a fuel a solution of ethanol and water in the proportion of 74% and liquid oxygen as oxidant. It was propelled by its own engine for 65 seconds, during which a programmed engine controlled the rocket's inclination at a previously established angle. The rocket reached an altitude of about 80 km, and the engine stopped, at which point it entered a ballistic trajectory to the target.

Rocket engine • A percentage of 80 -95% of the mass of an engine is represented by Propergol (propellant), consisting of two substances (fuel and oxide/ carburant) mixed which do not react at temperatures lower than the ignition temperature.

Who was Hermann Oberth? Hermann Oberth is, unfortunately, more known internationally than in Romania, especially in the restricted world of astronaut scientists. However, in Sibiu, Medias and Sighisoara, where Oberth was born, raised and studied, people know a great deal about the life and achievements of the Transylvanian scholar and speak with great pride about their citizen, "the brilliant, but a bit crazy, from Sighisoara.

Biography of Hermann Oberth, who was to become the father of the astronauts, was born in Sibiu in 1894. He spends his childhood and adolescence in Sighişoara and Mediaş, to later study physics in Cluj, Munich, Götingen and Heidelberg. In 1922 he began to write his first work "Rocket to interplanetary Space", In 1923 he supports as a bachelor's work in Cluj, after being rejected at the University of Heidelberg. In the Fall of 1929, Oberth launches his first liquid fuel rocket called Kegeldüse, and after 1932 he designs a solid fuel rocket according to medias. At building the world's first large rocket, 95 of Hermann Oberth's inventions and recommendations were used.

Benefits of liquid fuel rocket • Today, almost every rocket uses several steps. Based on this principle, it disposes of each stage as it is empty, and it continues with a smaller and lighter rocket. The first artificial satellite launched by the Americans in January 1958, Explorer, used a four-speed rocket. • Inventory of the liquid fuel rocket has prepared the ground for artificial satellites, flights to the Moon with people on board, and crew flights to any part of the solar system

Thank you so much for your attention!