How far can jet and/or rocket engine technology be miniaturized?

>>34935435
You are now imagining a gun with 3 stage cartridges, propellant, jet, and scramjet.

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>>34935435
>turbofan, turbojet, ram, scram
not rockets you fucking retard

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21KB, 574x375px

>>34935435
https://www.youtube.com/watch?v=IroOVamQZHQ

But down scale it to 40, 12.7, 7.62, and 5.56.

>>34935435
>how far
To the point the burn rate is too quick to register as a rocket. You are now aware that gun powder can be used as a rocket fuel. Solid of course.

Liquid and jets has a limit to how Smol the engine can be before it lacks the power to be useful (this depends on type of engine) and practical manufacturing.

This is the shortform non dick answer. Don't expect rocket powered bullets anytime soon.