A model rocket usually only holds one engine. The size of the engine and the amount of thrust that you get from varies. Becoming apart of a model rocket organization can help you determine the right engine for your rocket.
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The Saturn V rocket had five rocket engines in its first stage, called the F-1 engines. These engines were responsible for providing the necessary thrust to lift the rocket off the ground and into space.
The two main types of rocket engines are Solid fuel rocket engines and Liquid fuel rocket engines.
5 J-2 Engines
Rocket engines are not air breathing engines and hence they can be propelled into space.
Rocket engine
It depends. Some rocket engines have a single stage, some have 3 or more. Staging allows for the overall weight of the vehicle to be reduced by dropping off parts of the rocket and continuing on with smaller rocket engines and less fuel.
The number of engines on a first stage rocket can vary significantly depending on the design and intended payload. For example, the SpaceX Falcon 9 has nine Merlin engines in its first stage, while the Saturn V rocket had five F-1 engines. Some smaller rockets may have just one or two engines. Ultimately, the configuration is tailored to the rocket's mission requirements and performance specifications.
Model rocket engines are reproductions of rocket engines that are scaled down to a much smaller size than the real thing. They usually don't do anything and are for display purposes.
a rocket
the rocket is accelerating
There are two main types of rocket engines: Solid fuel and liquid fuel. Liquid fuel rocket engines are usually considered significantly better than solid propulsion units, however, they are also significantly more expensive.