How does supercharging work?

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It reads that I can "touch the plane with a second finger to supercharge my weapon", but touching the screen with second finger doesn't seem to do anything (at least visually I can't tell the difference).
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How does Tesla Supercharger work?
How does a Tesla Supercharger work? Tesla's Superchargers are very simple to use. All you do is park up next to a machine, plug in, and wait for the cable to lock in place. The Supercharger will then begin delivering power, and the logo next to your charging port will turn green.How is supercharger powered?
The supercharger is powered by the engine, via a pulley attached to the crankshaft. The faster the engine turns, the faster the little impeller inside the supercharger spins. The impeller compresses the incoming air and allows more of it to be directed to the engine, where it produces more power.How does a supercharger blower work?
Superchargers use air to increase power, meaning that overboosting the supercharger will blow hot air into the engine and could cause damage.SUPERCHARGERS | How They Work
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