The Variable Specific Impulse Magnetoplasma Rocket (VASIMR)is very likely the most efficient rocket engine.
Liquid oxygen (LOX) is commonly used as an oxidizer in rocket engines due to its high oxidizing power and high density, which allows for efficient combustion reactions in the engine.
Diesel engine
Rocket fuel contains oxygen, which is not found in space. A rocket in space could theoretically work in space if it were to carry its own oxygen, but other fuels such as hydrogen are more efficient.
One of the most advanced rocket engines is the Raptor engine developed by SpaceX. It is a full-flow staged combustion engine that uses liquid methane as fuel and liquid oxygen as oxidizer. The Raptor engine is designed to power the Starship spacecraft for missions to Mars and beyond.
A rocket nozzle is crucial for the efficient conversion of high-pressure gas into thrust. It accelerates and directs the flow of exhaust gases out of the rocket engine to generate propulsion. The size and shape of the nozzle influence the velocity and efficiency of the exhaust gases, impacting the overall performance of the rocket.
To increase rocket speed, you can add more propellant to increase thrust, reduce the rocket's mass by shedding unnecessary weight, or improve aerodynamics to minimize drag. Additionally, optimizing the rocket's trajectory and using efficient engine designs can also help increase speed.
The propulsive force of a rocket engine is called thrust. It is the force that propels the rocket in the opposite direction to the exhaust expelled from the rocket engine.
Rocket engines obtain their thrust in accordance with Isaac Newton's third law, making the rocket a reaction engine. A rocket engine is simply a jet engine.
A liquid-fuel rocket or a liquid rocket is a rocket with an engine that uses propellants in liquid form.
Rocket engine
A rocket engine, or simply "rocket," is a jet engine[1] that uses only propellant mass for forming its high speed propulsive jet. Rocket engines are reaction engines and obtain thrust in accordance with Newton's third law. Since they need no external material to form their jet, rocket engines can be used for spacecraft propulsion as well as terrestrial uses, such as missiles. Most rocket engines are internal combustion engines, although non combusting forms also exist.Rocket engines as a group, have the highest exhaust velocities, are by far the lightest, and are the most energy efficient (at least at very high speed) of all types of jet engines. However, for the thrust they give, due to the high exhaust velocity and relatively low specific energy of rocket propellant, they consume propellant very rapidly.
rocket what? an engine?, need to know the year and engine size.