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Reaction engines
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- Rocket engines are reaction engines. The basic principle driving a rocket engine is the famous Newtonian principle that "to every action there is an equal and opposite reaction." A rocket engine is throwing mass in one direction and benefiting from the reaction that occurs in the other direction as a result.
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A rocket engine uses stored rocket propellants as the reaction mass for forming a high-speed propulsive jet of fluid, usually high-temperature gas. Rocket engines are reaction engines, producing thrust by ejecting mass rearward, in accordance with Newton's third law.
Nov 20, 2023 · Rocket Engine. In a rocket engine, fuel and a source of oxygen, called an oxidizer, are mixed and exploded in a combustion chamber. The combustion produces hot exhaust which is passed through a nozzle to accelerate the flow and produce thrust. For a rocket, the accelerated gas, or working fluid, is the hot exhaust produced during combustion ...
Spacecraft: Rocket engines are designed to propel and maneuver vehicles already in space. They are typically smaller and less powerful than the engines used for launch vehicles. Still, they must be highly reliable, efficient, and versatile to enable the spacecraft to travel long distances and perform complex missions.
How do rocket engines work? What makes them work in a vacuum? In this video, we talk about the basic physics behind how a rocket engine works.
- 14 min
- 101.7K
- Martian Wolf
A very important characteristic for a rocket engine is the amount of thrust created by a kilogram of propellant burned and ejected. This relation is called SPECIFIC IMPULSE (Isp). Basically, it measures the force created by the spacecraft depending on the quantity of propellant consumed per unit of time.
In the case of rockets, the action is the force produced by the expulsion of gas, smoke, and flames from the nozzle end of a rocket engine. The reaction force propels the rocket in the opposite direction.When a rocket lifts off, the combustion products from the burning propellants accelerate rapidly out of the engine.
