Engines of the world Crossword

The name of an element used as an oxidizer.
What is the name of the liquid fuel most commonly used in rockets.
A petrol engine has this, but a diesel engine doesn't.
The name of the second stroke in a 4 stroke engine.
Rockets work on _______'s 3rd law.
The pistons drive this. It carries the powers to the wheels.
The amount of pistons in a 2 stroke engine.
Petrol compression ratios are ______than Diesel.
Diesel compression ratios are________than petrol.
The______stroke is when the burned air/fuel mix is blown out.
The state at which oxygen is stored in rockets.
This substance is extremely light weight and burns with intensity.
What property of space prevents us from using jet engines to travel in it?
What compresses the air/fuel mixture in the cylinder?
"Every action has an equal and opposite_______."
The sum of all the cylinder volumes.
The_____ _____allows the air/fuel mix to enter the cylinder.
The__ _____controls the valve movement in a 4 stroke engine.
The intake ______ is the part of an engine that supplies the fuel/air mixture to the cylinders.
In a normal 2 stroke engine there aren't valves, but there are 2 ___.