Eli5:how does petrol engines differ from diesel engine?if so then what type of engine is used in rockets?
In: Technology
Both use a piston (I’ll leave the Wankel Engine out of this)
Petrol or gasoline engines work like this. The piston is pulled down to the bottom of the cylinder. During this process the cylinder is filled with a combination of air and fuel. The piston is brought back up to compress the mixture and ignite it with a spark from the spark plug. The Combustion forces the piston down and starts the process over.
Diesel works similar. However the combustion is caused by the air temperature after compression. As the air fuel mixture is compressed it heats up and then ignites.
Rockets use something completely different. They use Rocket Engines. Fuel and oxygen are combined and sent to a compression chamber and ignited. The exhaust is then sent through nozzle. That nozzle will help accelerate the flow. This produces the thrust needed to move the rocket.
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