this post was submitted on 02 Mar 2026
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TIL, that rotary machines guns spin to cool down.
Uh, what did you think the rotary barrels were for?
...more barrel = more bullet? 🥴
MORE DAKKA
No dakka, just brrrrrrt.
I mean, thats not wrong.
something something technically correct something
I mean technically they spin to cool but also because they use the time it takes to rotate to unload and reload a round. Basically "1 fire, 1 move out of the way, 2 fire, 1 unload, 2 move, 3 fire, 1 load, 2 unload, 3 move, etc." multiple reasons
As someone else put it. No dakka, just brrt. When you have 8 dakkas in sync, you get all the -kka happening while the next barrel is already Da-, so dakka dakka turns into dadadadadadddddddrrrrrrtt
It's more that using multiple barrels keeps any one barrel from heating up too quickly, and it's easier to have multiple barrels than entire firing assemblies.
Not only that but the barrel is rotating quite fast which encourages cooling.
Sure, but realistically air isn't a good enough heat conductor for this to help much. Fixed machine guns used to use water-cooling but that's been phased out and modern weapons simple replace the barrel when it gets too hot.