In a rocket engine, there is a lot that goes into work. The success is dependent on small things without which the propulsion will be impossible. In a Rocket engine, the fuel is mixed with an oxidizer and then exploded in a combustion chamber. This produces the exhaust, and this is used to produce thrust. The thrust helps the rocket to fly. There are various types of rocket propulsion, and some of them are here.
Solid fuel chemical propulsion:
This is the type of rocket that used solid propellants. The prime example can be the rocket that was powered by the gun powder and was used in the wars. They were used by the Chinese, Mongols, and Persians in the 13th century. This was the case until the 20th century. All types of rockets used some form of solid or powdered propellant, but as soon as the liquid propellants made its way in the military armaments, they were appreciated. The one thing about solid propellants is that they can be stored for a long time without much degradation. This is the reason they have been used in military missiles.
Liquid fuel chemical propulsion
A liquid fuel chemical propulsion is the propulsion where the rocket engine uses liquid propellants. This is because liquids have a high density, and a high impulse. Till the 20th century, the solid fuel was the best choice, but the Liquids made its way.
Cold-gas chemical propulsion
This is the type of propulsion where the rocket engine uses the pressurized gas to generate thrust. Compared to the regular propulsion, the cold-gas propulsion doesn’t have any combustion, so the intensity of the thrust is low. They are very simple and have an easy design. They have been considered as the “simplest manifestation of a rocket”. Thee design has a fuel tank, a regulating valve, a propelling nozzle, and required plumbing. This is the cheapest that you can go to. They are good for stabilizing small space missions.
Ion Rocket propulsion:
This is electric propulsion that is used for spacecraft propulsion. The thrust is created by accelerating ions with the help of electricity. It ionizes a neutral gas and extracts electrons out of atoms. With an electric field, the temporarily stored electrons are injected by a neutralizer in the cloud of Ions after it passes through the electrostatic grid. The air is neutral and can freely disperse without electrical interference. This is one of the main types of propulsion. It no doubt differs from the others, but has its purpose, and delivers with accuracy.
In short words, you can say that the rocket propulsion is the system that helps the rocket to lift from the ground. This it dies with the help of the force, and there are various kinds of force that it uses. It uses different kinds of propulsion to lift the rocket, which all have a specific purpose.