Can inertia be used as a force for propulsion?
In: 9
There is [Spinlaunch](https://www.space.com/spinlaunch-aces-10th-suborbital-test-launch), which is a hilariously awesome way to send something to space, but I’m not sure if it counts.
There’s the reaction wheels that are used on a lot of satellites to keep them pointed in the right direction without having to use up fuel, but that one isn’t really propulsion.
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