Rocket engine cycles: How do you power a rocket engine?
Everyday Astronaut Everyday Astronaut
1.51M subscribers

 Published On Apr 28, 2022

Rocket engines are incredibly complex machines, pushing the boundaries of material science and human ingenuity. And there’s a wide range of ways you can actually power a rocket engine and make it work.

They can be super simple, like just opening the valves of a tank under high pressure to having complex pumps arranged in a fashion so confusing it’s a miracle anyone ever figured out how to build them in the first place.

So today we’re going to talk about cold gas, pressure fed, electric pump fed, open cycle, closed cycle, full flow staged combustion, tap off and expander cycles. We’ll go over their pros and cons and lots of fun examples of each one!

Check out our article version of this video too for sources and links! -

00:00 - Intro
02:55 - Basics Of Rocket Engines
05:35 - Cold Gas Thrusters
10:25 - Monopropellant Pressure Fed
14:15 - Bipropellant Pressure Fed
17:45 - Electric Pump Fed
21:05 - Open Cycle
25:40 - Closed Cycle [Ox Rich]
31:15 - Closed Cycle [Fuel Rich]
35:25 - Full Flow Staged Combustion
44:25 - Tap-Off Cycle
46:45 - Expander Cycle
52:20 - Summary


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